|
APGIII 2009. E&OE, and as far as can be ascertained, these tables conform to the current APGIII taxonomic system (and if they don't, then your Author should edit them so that they do). But the only ones corrected from AGPII to AGPIII might be for plants only growing in Suffolk - in fact, indeed they are. Which means that there are an unknown number still within this table which are still under the AGPII naming system... Who knows which they are! The taxonomy itself may be subject to revision from time to time, depending upon the current whim of any taxonomists (who sometimes, it seems, cannot decide amongst themselves to which family genera belong, and continually swap them about every few years as one sort of taxonomist battles it out with another sort). And in any case, taxonomists are continually changing their minds upon the constitution of the tables, with major upheavals and re-appraisals every decade or so. Note that the tables apply only to representatives of plants which happen to grow in the UK (or have in the last 60 years grown; some may be extinct in the UK now). |
| BOTANICAL NAME | VERNACULAR NAME |
| Abelia uniflora | |
| Abies alba | European Silver-fir |
| Abies cephalonica | Greek Fir |
| Abies cilicica | Cilician Fir |
| Abies concolor | Colorado White-fir |
| Abies delavayi | Delavay's Silver-fir |
| Abies firma | Momi Fir |
| Abies grandis | Giant Fir |
| Abies homolepis | Nikko Fir |
| Abies lasiocarpa | Subalpine Fir |
| Abies nordmanniana | Caucasian Fir |
| Abies pinsapo | Spanish Fir |
| Abies procera | Noble Fir |
| Abies veitchii | Veitch's Silver-fir |
| Abutilon malvifolium | |
| Abutilon pictum | Chinese Lantern |
| Abutilon theophrasti | Velvetleaf |
| Acacia falciformis | Hickory Wattle |
| Acacia melanoxylon | Australian Blackwood |
| Acacia micrantha | |
| Acaena anserinifolia | Bronze Pirri-pirri-bur |
| Acaena anserinifolia x inermis | |
| Acaena caesiiglauca | Glaucous Pirri-pirri-bur |
| Acaena hieronymi | |
| Acaena inermis | Spineless Acaena |
| Acaena magellanica | |
| Acaena microphylla | |
| Acaena novae-zelandiae | Pirri-pirri-bur |
| Acaena ovalifolia | Two-spined Acaena |
| Acaena ovina | Sheep's-bur |
| Acaena pinnatifida | |
| Acaena sericea | |
| Acaena splendens | |
| Acantholimon glumaceum | |
| Acanthospermum australe | Spiny-bur |
| Acanthospermum glabratum | |
| Acanthus mollis | Bear's-breech |
| Acanthus spinosus | Spiny Bear's-breech |
| Acer campestre | Field Maple |
| Acer cappadocicum | Cappadocian Maple |
| Acer heldreichii | Heldrich's Maple |
| Acer japonicum | Downy Japanese-maple |
| Acer macrophyllum | Oregon Maple |
| Acer monspessulanum | Montpellier Maple |
| Acer negundo | Ashleaf Maple |
| Acer palmatum | Smooth Japanese-maple |
| Acer platanoides | Norway Maple |
| Acer pseudoplatanus | Sycamore |
| Acer rubrum | Red Maple |
| Acer rufinerve | Grey-budded Snake-bark-maple |
| Acer saccharinum | Silver Maple |
| Acer saccharum | Sugar Maple |
| Acer tataricum | Tartar Maple |
| Acer truncatum | Shantung Maple |
| Achillea ageratum | Sweet Yarrow |
| Achillea alpina | |
| Achillea aspleniifolia | |
| Achillea cartilaginea | |
| Achillea cretica | Chamomile-leaved Lavender-cotton |
| Achillea crithmifolia | |
| Achillea decolorans | Serrated Yarrow |
| Achillea distans | Tall Yarrow |
| Achillea distans ssp. tanacetifolia | |
| Achillea filipendulina | Fern-leaf Yarrow |
| Achillea ligustica | Southern Yarrow |
| Achillea micrantha | |
| Achillea millefolium | Yarrow |
| Achillea nobilis | |
| Achillea ochroleuca | |
| Achillea pannonica | |
| Achillea ptarmica | Sneezewort |
| Achillea santolina | |
| Achillea tomentosa | Yellow Milfoil |
| Achyranthes aspera | Chaff-flower |
| Aconitum angustifolium | |
| Aconitum carmichaelii | |
| Aconitum lycoctonum | Wolf's-bane |
| Aconitum lycoctonum ssp. vulparia | |
| Aconitum napellus | Monk's-hood |
| Aconitum napellus agg. | |
| Aconitum napellus ssp. firmum | |
| Aconitum napellus ssp. napellus | |
| Aconitum napellus ssp. vulgare | |
| Aconitum napellus x variegatum = A. x stoerkianum | Hybrid Monk's-hood |
| Acorus calamus | Sweet-flag |
| Acorus gramineus | Slender Sweet-flag |
| Acroptilon repens | Russian Knapweed |
| Actaea erythrocarpa | |
| Actaea spicata | Baneberry |
| Adenocarpus complicatus | |
| Adiantum capillus-veneris | Maidenhair Fern |
| Adiantum pedatum | |
| Adonis aestivalis | Summer Pheasant's-eye |
| Adonis annua | Pheasant's Eye |
| Adonis flammea | Large Pheasant's-eye |
| Adoxa moschatellina | Moschatel |
| Aegilops bicornis | |
| Aegilops biuncialis | |
| Aegilops comosa | |
| Aegilops crassa | |
| Aegilops cylindrica | |
| Aegilops geniculata | |
| Aegilops neglecta | |
| Aegilops peregrina | |
| Aegilops speltoides | |
| Aegilops speltoides ssp. ligustica | |
| Aegilops speltoides ssp. speltoides | |
| Aegilops tauschii | |
| Aegilops triuncialis | |
| Aegilops umbellulata | |
| Aegilops vavilovii | |
| Aegilops ventricosa | |
| Aegopodium podagraria | Ground-Elder |
| Aeonium arboreum | Tree Aeonium |
| Aeonium canariense | |
| Aeonium cuneatum | Aeonium |
| Aesculus carnea | Red Horse-Chestnut |
| Aesculus flava | Yellow Buckeye |
| Aesculus hippocastanum | Horse-Chestnut |
| Aesculus indica | Indian Horse-chestnut |
| Aesculus parviflora | Bottlebrush Buckeye |
| Aetheorhiza bulbosa | Tuberous Hawk's-beard |
| Aethionema grandiflorum | Persian Candytuft |
| Aethionema saxatile | Burnt Candytuft |
| Aethusa cynapium | Fools Parsley |
| Aethusa cynapium ssp. agrestis | |
| Aethusa cynapium ssp. cynapium | |
| Aethusa cynapium ssp. elata | |
| Agapanthus praecox | African Lily |
| Agapanthus praecox ssp. orientalis | |
| Agave americana | Centuryplant |
| Ageratum houstonianum | Flossflower |
| Agoseris grandiflora | |
| Agrimonia eupatoria | Agrimony |
| Agrimonia eupatoria x procera = A. x wirtgenii | |
| Agrimonia procera | Fragrant Agrimony |
| Agrocharis gracilis | |
| Agrocharis melanantha | |
| Agropyron cristatum | |
| Agropyron desertorum | |
| Agrostemma githago | Corncockle |
| Agrostemma gracilis | |
| Agrostis aemula | |
| Agrostis avenacea | Blown-grass |
| Agrostis billardierei | |
| Agrostis canina | Velvet Bent |
| Agrostis canina agg. | |
| Agrostis capillaris | Common Bent |
| Agrostis capillaris x castellana = A. x fouilladeana | |
| Agrostis capillaris x gigantea = A. x bjoerkmanii | |
| Agrostis capillaris x stolonifera = A. x murbeckii | |
| Agrostis capillaris x vinealis = A. ? x sanionis | |
| Agrostis castellana | Highland Bent |
| Agrostis curtisii | Bristle Bent |
| Agrostis diegoensis | |
| Agrostis eriantha | |
| Agrostis exarata | Spike Bent |
| Agrostis gigantea | Black Bent |
| Agrostis gigantea x stolonifera | |
| Agrostis hyemalis | Small Bent |
| Agrostis lachnantha | African Bent |
| Agrostis nebulosa | |
| Agrostis pourretii | |
| Agrostis preissii | |
| Agrostis scabra | Rough Bent |
| Agrostis stolonifera | Creeping Bent |
| Agrostis stolonifera x Polypogon viridis = X Agropogon robinsonii | |
| Agrostis stolonifera x vinealis | |
| Agrostis tenerrima | |
| Agrostis vinealis | Brown Bent |
| Ailanthus altissima | Tree-of-heaven |
| Aira caryophyllea | Silver Hair-grass |
| Aira cupaniana | |
| Aira elegantissima | |
| Aira praecox | Early Hair-grass |
| Aira provincialis | |
| Ajuga chamaepitys | Ground Pine |
| Ajuga genevensis | Cornish Bugle |
| Ajuga iva | |
| Ajuga pyramidalis | Pyramidal Bugle |
| Ajuga reptans | Bugle |
| Ajuga reptans x pyramidalis = A. x pseudopyramidalis | |
| Akebia quinata | Five-leaf Akebia |
| Alcea acaulis | |
| Alcea rosea | Hollyhock |
| Alchemilla acutiloba | |
| Alchemilla alpina | Alpine Lady's-mantle |
| Alchemilla conjuncta | Silver Lady's-mantle |
| Alchemilla filicaulis | Hairy Lady's-mantle |
| Alchemilla filicaulis ssp. filicaulis | |
| Alchemilla filicaulis ssp. vestita | |
| Alchemilla glabra | Smooth Lady's-Mantle |
| Alchemilla glaucescens | |
| Alchemilla glomerulans | |
| Alchemilla micans | |
| Alchemilla minima | |
| Alchemilla mollis | Garden Lady's-mantle |
| Alchemilla monticola | |
| Alchemilla subcrenata | |
| Alchemilla tytthantha | |
| Alchemilla venosa | |
| Alchemilla wichurae | |
| Alchemilla xanthochlora | Intermediate Lady's-mantle |
| Alisma gramineum | Ribbon-leaved Water-plantain |
| Alisma lanceolatum | Narrow-leaved Water-plantain |
| Alisma plantago-aquatica | Water-Plantain |
| Alisma plantago-aquatica x lanceolatum = A. x rhicnocarpum | |
| Alkanna lutea | |
| Alkanna tinctoria | Dyer's Alkanet |
| Alliaria petiolata | Garlic Mustard |
| Allium ampeloprasum | |
| Allium carinatum | Keeled Garlic |
| Allium cepa | Onion |
| Allium cyrilli | |
| Allium ericetorum | |
| Allium fistulosum | Welsh Onion |
| Allium moly | Yellow Garlic |
| Allium neapolitanum | Neapolitan Garlic |
| Allium nigrum | Broad-leaved Leek |
| Allium oleraceum | Field Garlic |
| Allium paniculatum | Pale Garlic |
| Allium paniculatum ssp. fuscum | |
| Allium paradoxum | Few-Flowered Garlic |
| Allium pendulinum | Italian Garlic |
| Allium porrum | Leek |
| Allium roseum | Rosy Garlic |
| Allium sativum | Garlic |
| Allium schoenoprasum | Chives |
| Allium scorodoprasum | Sand Leek |
| Allium sphaerocephalon | Round-Headed Leek |
| Allium subhirsutum | Hairy Garlic |
| Allium triquetrum | Three-Cornered Garlic |
| Allium tuberosum | Chinese Chives |
| Allium unifolium | American Garlic |
| Allium ursinum | Ramsons |
| Allium vineale | Wild Onion |
| Allowissadula sessei | |
| Alnus cordata | Italian Alder |
| Alnus glutinosa | Alder |
| Alnus glutinosa x incana = A. x hybrida | |
| Alnus incana | Grey Alder |
| Alnus maritima | Seaside Alder |
| Alnus orientalis | Oriental Alder |
| Alnus rubra | Red Alder |
| Alnus viridis | Green Alder |
| Alonsoa caulialata | |
| Alonsoa incisifolia | Cut-leaved Mask-flower |
| Alonsoa peduncularis | |
| Alonsoa warscewiczii | Mask-flower |
| Alopecurus aequalis | Orange Foxtail |
| Alopecurus borealis | Alpine Foxtail |
| Alopecurus bulbosus | Bulbous Foxtail |
| Alopecurus geniculatus | Marsh Foxtail |
| Alopecurus geniculatus x aequalis = A. x haussknechtianus | |
| Alopecurus geniculatus x bulbosus = A. x plettkei | |
| Alopecurus macrostachyos | |
| Alopecurus magellanicus | |
| Alopecurus myosuroides | Black Grass |
| Alopecurus pratensis | Meadow Foxtail |
| Alopecurus pratensis x geniculatus = A. x brachystylus | |
| Alopecurus rendlei | |
| Alopecurus setarioides | |
| Alopecurus utriculatus | |
| Alstroemeria aurea | Peruvian Lily |
| Alternanthera caracasana | |
| Alternanthera ficoidea | Parrot-leaf |
| Alternanthera nodiflora | Joyweed |
| Alternanthera paronychioides | |
| Alternanthera pungens | |
| Alternanthera sessilis | Rabbit-meat |
| Althaea cannabina | |
| Althaea officinalis | Marsh-Mallow |
| Alyssum alyssoides | Small Alison |
| Alyssum dasycarpum | |
| Alyssum desertorum | |
| Alyssum hirsutum | |
| Alyssum montanum | Mountain Alison |
| Alyssum murale | |
| Alyssum serpyllifolium | |
| Alyssum simplex | |
| Alyssum strigosum | |
| Amaranthus acutilobus | |
| Amaranthus albus | White Pigweed |
| Amaranthus arenicola | |
| Amaranthus blitoides | Prostrate Pigweed |
| Amaranthus blitum | Guernsey Pigweed |
| Amaranthus bouchonii | Indehiscent Amaranth |
| Amaranthus capensis | Cape Pigweed |
| Amaranthus capensis ssp. uncinatus | |
| Amaranthus caudatus | Love-lies-bleeding |
| Amaranthus clementii | |
| Amaranthus crassipes | |
| Amaranthus crispus | Crisp-leaved Amaranth |
| Amaranthus cruentus | Purple Amaranth |
| Amaranthus deflexus | Perennial Pigweed |
| Amaranthus graecizans | Short-tepalled Pigweed |
| Amaranthus graecizans ssp. graecizans | |
| Amaranthus graecizans ssp. sylvestris | |
| Amaranthus hybridus | Green Amaranth |
| Amaranthus hypochondriacus | Prince's-Feather |
| Amaranthus macrocarpus | Desert Amaranth |
| Amaranthus mitchellii | Mitchell's Amaranth |
| Amaranthus muricatus | Rough-fruited Amaranth |
| Amaranthus palmeri | Dioecious Amaranth |
| Amaranthus powellii | Powell's Amaranth |
| Amaranthus quitensis | Mucronate Amaranth |
| Amaranthus retroflexus | Common Amaranth |
| Amaranthus retroflexus x hybridus = A. x ozanonii | |
| Amaranthus rudis | Western Water-hemp |
| Amaranthus schinzianus | |
| Amaranthus scleropoides | |
| Amaranthus spinosus | Spiny Amaranth |
| Amaranthus standleyanus | Indehiscent Pigweed |
| Amaranthus thunbergii | Thunberg's Pigweed |
| Amaranthus tricolor | Tampala |
| Amaranthus tuberculatus | Rough-fruited Water-hemp |
| Amaranthus viridis | |
| Amaranthus watsonii | Watson's Amaranth |
| Amaryllis belladonna | Jersey Lily |
| Amberboa moschata | Sweet-sultan |
| Ambrosia acanthicarpa | Hooker's Bur-ragweed |
| Ambrosia artemisiifolia | Ragweed |
| Ambrosia maritima | |
| Ambrosia peruviana | |
| Ambrosia psilostachya | Perennial Ragweed |
| Ambrosia tenuifolia | Lacy Ambrosia |
| Ambrosia trifida | Giant Ragweed |
| Amelanchier lamarckii | Juneberry |
| Amelanchier ovalis | Snowy Mespilus |
| Amelanchier spicata | Low Juneberry |
| Amellus microglossus | |
| Amellus strigosus | |
| Amethystea caerulea | |
| Ammi majus | Bullwort |
| Ammi visnaga | Toothpick-plant |
| Ammobium alatum | |
| Ammochloa pungens | |
| Ammophila arenaria | Marram |
| Ammophila breviligulata | American Marram |
| Amorphophallus rivieri | Umbrella Arum |
| Amsinckia calycina | Hairy Fiddleneck |
| Amsinckia lycopsoides | Scarce Fiddleneck |
| Amsinckia micrantha | Common Fiddleneck |
| Amsinckia spectabilis | Seaside Fiddleneck |
| Amsinckia tessellata | Tessellate Fiddleneck |
| Anacamptis pyramidalis | Pyramidal Orchid |
| Anacamptis pyramidalis x Gymnadenia conopsea = X Gymnanacamptis anacamptis | |
| Anacyclus clavatus | |
| Anacyclus radiatus | |
| Anacyclus valentinus | |
| Anagallis arvensis | |
| Anagallis arvensis ssp. arvensis | Scarlet Pimpernel |
| Anagallis arvensis ssp. foemina | Blue Pimpernel |
| Anagallis monelli | Garden Pimpernel |
| Anagallis tenella | Bog Pimpernel |
| Anaphalis margaritacea | Pearly Everlasting |
| Anaphalis triplinervis | |
| Anarrhinum bellidifolium | Daisy-leaved Toadflax |
| Anchusa arvensis | Bugloss |
| Anchusa arvensis ssp. arvensis | |
| Anchusa arvensis ssp. orientalis | |
| Anchusa azurea | Garden Anchusa |
| Anchusa capensis | Cape Alkanet |
| Anchusa ochroleuca | Yellow Alkanet |
| Anchusa ochroleuca x officinalis = A. x baumgartenii | |
| Anchusa officinalis | Alkanet |
| Anchusa strigosa | |
| Anchusa stylosa | |
| Anchusa undulata | |
| Anchusa variegata | |
| Andromeda polifolia | Bog Rosemary |
| Andropogon distachyos | |
| Androsace maxima | Annual Androsace |
| Andryala integrifolia | |
| Anemone apennina | Blue Anemone |
| Anemone blanda | Balkan Anemone |
| Anemone coronaria | Poppy Anemone |
| Anemone hortensis x pavonina = A. x fulgens | |
| Anemone hupehensis x vitifolia = A. x hybrida | Japanese Anemone |
| Anemone nemorosa | Wood Anemone |
| Anemone ranunculoides | Yellow Anemone |
| Anemone sylvestris | Snowdrop Anemone |
| Anethum graveolens | Dill |
| Angelica archangelica | Garden Angelica |
| Angelica pachycarpa | Portuguese Angelica |
| Angelica sylvestris | Wild Angelica |
| Anisantha diandra | Great Brome |
| Anisantha fasciculata | |
| Anisantha madritensis | Compact Brome |
| Anisantha rigida | Ripgut Brome |
| Anisantha rubens | Foxtail Brome |
| Anisantha sterilis | Barren Brome |
| Anisantha tectorum | Drooping Brome |
| Anisodontea scabrosa | |
| Anoda cristata | Spurred Anoda |
| Anogramma leptophylla | Jersey Fern |
| Anredera cordifolia | Madeira-vine |
| Antennaria dioica | Mountain Everlasting |
| Anthemis abrotanifolia | |
| Anthemis altissima | |
| Anthemis arvensis | Corn Chamomile |
| Anthemis austriaca | Austrian Chamomile |
| Anthemis cotula | Stinking Chamomile |
| Anthemis cotula x Tripleurospermum inodorum = X Tripleurothemis maleolens | |
| Anthemis cretica | Mountain Dog-daisy |
| Anthemis hyalina | |
| Anthemis leucanthemifolia | |
| Anthemis maritima | |
| Anthemis muricata | |
| Anthemis punctata | Sicilian Chamomile |
| Anthemis punctata ssp. cupaniana | |
| Anthemis ruthenica | |
| Anthemis tinctoria | Yellow Chamomile |
| Anthemis tomentosa | Woolly Chamomile |
| Anthemis triumfetti | Southern Dog-daisy |
| Anthemis wiedemanniana | |
| Anthericum ramosum | Branched St Bernard's-lily |
| Antholyza ringens | |
| Anthoxanthum aristatum | Annual Vernal-grass |
| Anthoxanthum aristatum ssp. puelii | |
| Anthoxanthum odoratum | Sweet Vernal-Grass |
| Anthoxanthum ovatum | |
| Anthriscus caucalis | Bur Chervil |
| Anthriscus cerefolium | Garden Chervil |
| Anthriscus sylvestris | Cow Parsley |
| Anthyllis tetraphylla | Bladder Vetch |
| Anthyllis vulneraria | Kidney Vetch |
| Anthyllis vulneraria ssp. carpatica | |
| Anthyllis vulneraria ssp. corbierei | |
| Anthyllis vulneraria ssp. lapponica | |
| Anthyllis vulneraria ssp. polyphylla | |
| Anthyllis vulneraria ssp. vulneraria | |
| Antirrhinum majus | Snapdragon |
| Antirrhinum siculum | |
| Apera intermedia | |
| Apera interrupta | Dense Silky-bent |
| Apera spica-venti | Loose Silky-bent |
| Aphanes arvensis | Parsley-Piert |
| Aphanes arvensis agg. | |
| Aphanes australis | Slender Parsley-piert |
| Apium graveolens | Wild Celery |
| Apium inundatum | Lesser Marshwort |
| Apium nodiflorum | Fool's-Water-cress |
| Apium nodiflorum x inundatum = A. x moorei | |
| Apium nodiflorum x repens | |
| Apium repens | Creeping Marshwort |
| Aponogeton distachyos | Cape-Pondweed |
| Aptenia cordifolia | Heart-leaf Iceplant |
| Aquilegia olympica | |
| Aquilegia pubescens | |
| Aquilegia pyrenaica | Pyrenean Columbine |
| Aquilegia vulgaris | Columbine |
| Arabidopsis arenosa | Sand Rock-cress |
| Arabidopsis thaliana | Thale Cress |
| Arabis alpina | Alpine Rock-cress |
| Arabis caucasica | Garden Arabis |
| Arabis collina | Rosy Cress |
| Arabis hirsuta | Hairy Rock-cress |
| Arabis nova | |
| Arabis petraea | Northern Rock-Cress |
| Arabis scabra | Bristol Rock-cress |
| Arabis verna | |
| Arachis hypogaea | Peanut |
| Aralia chinensis | Chinese Angelica-tree |
| Aralia elata | Japanese Angelica-tree |
| Aralia racemosa | American-spikenard |
| Araucaria araucana | Monkey-Puzzle |
| Arbutus unedo | Strawberry Tree |
| Arbutus unedo x andrachne = A. x andrachnoides | Hybrid Strawberry-tree |
| Arctium lappa | Greater Burdock |
| Arctium lappa x minus = A. x nothum | |
| Arctium minus | Lesser Burdock |
| Arctium minus agg. | |
| Arctium nemorosum | Wood Burdock |
| Arctium tomentosum | Woolly Burdock |
| Arctostaphylos alpinus | Alpine Bearberry |
| Arctostaphylos uva-ursi | Bearberry |
| Arctotheca calendula | Plain Treasureflower |
| Arctotis breviscapa | |
| Arctotis stoechadifolia | White Arctotis |
| Aremonia agrimonioides | Bastard Agrimony |
| Arenaria balearica | Mossy Sandwort |
| Arenaria ciliata | Fringed Sandwort |
| Arenaria montana | Mountain Sandwort |
| Arenaria norvegica | |
| Arenaria norvegica ssp. anglica | English Sandwort |
| Arenaria norvegica ssp. norvegica | Arctic Sandwort |
| Arenaria leptoclados | Slender Sandwort |
| Arenaria serpyllifolia ssp. serpyllifolia | Thyme-Leaved Sandwort |
| Argemone mexicana | Mexican Poppy |
| Argyranthemum frutescens | Paris Daisy |
| Arisarum proboscideum | Mousetailplant |
| Aristea ecklonii | Blue Corn-lily |
| Aristida adscensionis | |
| Aristida benthamii | |
| Aristida congesta | |
| Aristida contorta | |
| Aristida oligantha | |
| Aristida ramosa | |
| Aristolochia clematitis | Birthwort |
| Aristolochia hirta | Breckland Birthwort |
| Aristolochia rotunda | Smearwort |
| Armeria arenaria | Jersey Thrift |
| Armeria maritima | |
| Armeria maritima ssp. elongata | Tall Thrift |
| Armeria maritima ssp. maritima | Thrift |
| Armeria maritima x arenaria | |
| Armeria pseudoarmeria | Estoril Thrift |
| Armoracia macrocarpa | |
| Armoracia rusticana | Horseradish |
| Arnebia pulchra | Prophet-flower |
| Arnica angustifolia | Arctic Arnica |
| Arnoseris minima | Lamb's Succory |
| Aronia arbutifolia | Red Chokeberry |
| Aronia melanocarpa | Black Chokeberry |
| Arrhenatherum album | |
| Arrhenatherum elatius | False Oat-grass |
| Artemisia abrotanum | Southernwood |
| Artemisia absinthium | Wormwood |
| Artemisia afra | |
| Artemisia anethifolia | |
| Artemisia annua | Annual Mugwort |
| Artemisia biennis | Slender Mugwort |
| Artemisia campestris | Field Wormwood |
| Artemisia chamaemelifolia | |
| Artemisia dracunculus | Tarragon |
| Artemisia herba-alba | |
| Artemisia longifolia | |
| Artemisia ludoviciana | Western Mugwort |
| Artemisia macrantha | |
| Artemisia maritima | Sea Wormwood |
| Artemisia norvegica | Norwegian Mugwort |
| Artemisia pontica | Roman Wormwood |
| Artemisia scoparia | |
| Artemisia sericea | |
| Artemisia stelleriana | Hoary Mugwort |
| Artemisia tschernieviana | |
| Artemisia verlotiorum | Chinese Mugwort |
| Artemisia vulgaris | Mugwort |
| Artemisia vulgaris x verlotiorum = A. x wurzellii | |
| Arthraxon hispidus | |
| Arum italicum | Italian Lords-and-Ladies |
| Arum italicum ssp. canariense | |
| Arum italicum ssp. italicum | |
| Arum italicum ssp. neglectum | |
| Arum maculatum | Lords-and-Ladies |
| Arum maculatum x italicum | |
| Aruncus dioicus | Buck's-Beard |
| Arundo donax | |
| Asarina procumbens | Trailing Snapdragon |
| Asarum europaeum | Asarabacca |
| Asparagus officinalis | Garden Asparagus |
| Asparagus prostratus | Wild Asparagus |
| Asperugo procumbens | Madwort |
| Asperula arvensis | Blue Woodruff |
| Asperula cynanchica | Squinancywort |
| Asperula cynanchica ssp. cynanchica | |
| Asperula cynanchica ssp. occidentalis | |
| Asperula laevigata | |
| Asperula orientalis | Annual Woodruff |
| Asperula taurina | Pink Woodruff |
| Asperula tinctoria | Dyer's Woodruff |
| Asphodeline lutea | Yellow Asphodel |
| Asphodelus albus | White Asphodel |
| Asphodelus fistulosus | Hollow-stemmed Asphodel |
| Asphodelus ramosus | |
| Aspidistra elatior | Cast-iron-plant |
| Asplenium adiantum-nigrum | Black Spleenwort |
| Asplenium adiantum-nigrum x obovatum = A. x sarniense | |
| Asplenium adiantum-nigrum x onopteris = A. x ticinense | |
| Asplenium adiantum-nigrum x septentrionale = A. x contrei | |
| Asplenium ceterach | Rusty-Back Fern |
| Asplenium fontanum | Smooth Rock-spleenwort |
| Asplenium marinum | Sea Spleenwort |
| Asplenium obovatum | Lanceolate Spleenwort |
| Asplenium obovatum ssp. lanceolatum | |
| Asplenium onopteris | Irish Spleenwort |
| Asplenium ruta-muraria | Wall-rue |
| Asplenium ruta-muraria x septentrionale = A. x murbeckii | |
| Asplenium septentrionale | Forked Spleenwort |
| Asplenium scolopendrium | Hart's-tongue |
| Asplenium scolopendrium x Asplenium adiantum-nigrum = X Asplenophyllitis jacksonii | |
| Asplenium scolopendrium x Asplenium obovatum = X Asplenophyllitis microdon | |
| Asplenium scolopendrium x Asplenium trichomanes = X Asplenophyllitis confluens | |
| Asplenium trichomanes | Maidenhair Spleenwort |
| Asplenium trichomanes ssp. pachyrachis | |
| Asplenium trichomanes ssp. quadrivalens | |
| Asplenium trichomanes ssp. trichomanes | |
| Asplenium trichomanes x ruta-muraria = A. x clermontiae | |
| Asplenium trichomanes x septentrionale = A. x alternifolium | Alternate-leaved Spleenwort |
| Asplenium viride | Green Spleenwort |
| Aster ageratoides | |
| Aster amellus | European Michaelmas-daisy |
| Aster ascendens | Long-leaved Aster |
| Aster concinnus | Narrow-leaved Smooth-aster |
| Aster cordifolius | Blue Wood-aster |
| Aster dumosus | Bushy Aster |
| Aster ericoides | Heath Aster |
| Aster junceus | Rush Aster |
| Aster laevis | Glaucous Michaelmas-daisy |
| Aster laevis x novi-belgii = A. x versicolor | Late Michaelmas-daisy |
| Aster lanceolatus | Narrow-leaved Michaelmas-daisy |
| Aster lateriflorus | Starved Aster |
| Aster linosyris | Goldilocks Aster |
| Aster macrophyllus | Large-leaved Aster |
| Aster novae-angliae | Hairy Michaelmas-daisy |
| Aster novi-belgii | Confused Michaelmas-daisy |
| Aster novi-belgii agg. | |
| Aster novi-belgii x lanceolatus = A. x salignus | Common Michaelmas-Daisy |
| Aster pilosus | Frost Aster |
| Aster praealtus | |
| Aster prenanthoides | Crooked-stem Aster |
| Aster puniceus | Red-stalk Aster |
| Aster schreberi | Nettle-leaved Michaelmas-daisy |
| Aster sedifolius | |
| Aster spectabilis | Showy Aster |
| Aster subulatus | Annual Saltmarsh-aster |
| Aster tripolium | Sea Aster |
| Aster umbellatus | Tall White-aster |
| Aster vimineus | Small White-aster |
| Asteriscus aquaticus | |
| Asteriscus maritimus | |
| Astilbe chinensis | Tall False-buck's-beard |
| Astilbe japonica | False-buck's-beard |
| Astilbe japonica x chinensis x rosea = A. x arendsii | Red False-buck's-beard |
| Astragalus alpinus | Alpine Milk-vetch |
| Astragalus boeticus | |
| Astragalus cicer | Chick-pea Milk-vetch |
| Astragalus cruciatus | |
| Astragalus danicus | Purple Milk Vetch |
| Astragalus glycyphyllos | Wild Liquorice |
| Astragalus hamosus | |
| Astragalus hispidulus | |
| Astragalus nuttallianus | |
| Astragalus odoratus | Lesser Milk-vetch |
| Astragalus scorpioides | |
| Astragalus sesameus | |
| Astragalus stella | |
| Astragalus tribuloides | |
| Astrantia carniolica | Carnic Masterwort |
| Astrantia major | Astrantia |
| Astrantia maxima | |
| Astrantia minor | Lesser Masterwort |
| Astrebla lappacea | |
| Athanasia crithmifolia | |
| Athanasia trifurcata | |
| Athyrium distentifolium | Alpine Lady-fern |
| Athyrium filix-femina | Lady-Fern |
| Atractylis cancellata | |
| Atractylis humilis | |
| Atriplex australasica | |
| Atriplex calotheca | |
| Atriplex eardleyae | Bell Saltbush |
| Atriplex glabriuscula | Babington's Orache |
| Atriplex glabriuscula x longipes = A. x taschereaui | Taschereau's Orache |
| Atriplex glabriuscula x praecox | |
| Atriplex glauca | |
| Atriplex halimus | Shrubby Orache |
| Atriplex hortensis | Garden Orache |
| Atriplex laciniata | Frosted Orache |
| Atriplex limbata | Spreading Saltbush |
| Atriplex littoralis | Grass-Leaved Orache |
| Atriplex littoralis x patula | |
| Atriplex longipes | Long-Stalked Orache |
| Atriplex micrantha | |
| Atriplex muelleri | Annual Saltbush |
| Atriplex oblongifolia | |
| Atriplex patula | Common Orache |
| Atriplex pedunculata | Pedunculate Sea-purslane |
| Atriplex platensis | |
| Atriplex portulacoides | Sea Purslane |
| Atriplex praecox | Early Orache |
| Atriplex prostrata | Spear-Leaved Orache |
| Atriplex prostrata x glabriuscula | |
| Atriplex prostrata x littoralis = A. x hulmeana | |
| Atriplex prostrata x longipes = A. x gustafssoniana | Kattegat Orache |
| Atriplex rosea | Redscale |
| Atriplex sagittata | Purple Orache |
| Atriplex semibaccata | Berry Saltbush |
| Atriplex semilunaris | |
| Atriplex spongiosa | Pop Saltbush |
| Atriplex stylosa | |
| Atriplex suberecta | Australian Orache |
| Atriplex tatarica | |
| Atropa belladonna | Deadly Nightshade |
| Aubrieta deltoidea | Aubretia |
| Aucuba japonica | Spotted Laurel |
| Aurinia saxatalis | Golden Alison |
| Avena barbata | Slender Oat |
| Avena brevis | |
| Avena byzantina | Algerian Oat |
| Avena fatua | Wild-oat |
| Avena fatua x sativa = A. x hybrida | |
| Avena nuda | Naked Oat |
| Avena sativa | Oat |
| Avena sativa ssp. praegravis | |
| Avena sativa ssp. sativa | |
| Avena sterilis | |
| Avena sterilis ssp. ludoviciana | Winter Wild-oat |
| Avena sterilis ssp. sterilis | Animated Oat |
| Avena strigosa | Bristle Oat |
| Axonopus affinis | |
| Avenula pratense | Meadow Oat-grass |
| Avenula pubescens | Downy Oat-grass |
| Axonopus compressus | Carpet-grass |
| Axonopus repens | |
| Axyris amaranthoides | Russian Pigweed |
| Azolla filiculoides | Water Fern |
| Baccharis halimifolia | Tree Groundsel |
| Bahia dissecta | |
| Bahia neomexicana | New Mexico Bahia |
| Baldellia ranunculoides | Lesser Water-Plantain |
| Ballota acetabulosa | False Dittany |
| Ballota hispanica | |
| Ballota nigra | Black Horehound |
| Ballota nigra ssp. meridionalis | |
| Ballota nigra ssp. nigra | |
| Ballota pseudodictamnus | |
| Baptisia tinctoria | Wild-indigo |
| Barbarea intermedia | Medium-flowered Winter-cress |
| Barbarea stricta | Small-flowered Winter-cress |
| Barbarea verna | American Winter-cress |
| Barbarea vulgaris | Winter-cress |
| Bartsia alpina | Alpine Bartsia |
| Bassia hyssopifolia | |
| Bassia muricata | |
| Bassia prostrata | |
| Bassia scoparia | Summer-cypress |
| Beckmannia eruciformis | European Slough-grass |
| Beckmannia syzigachne | American Slough-grass |
| Begonia cucullata x schmidtiana = B. x semperflorens | Wax Begonia |
| Begonia grandis | Hardy Begonia |
| Begonia rex | Painted-leaf Begonia |
| Bellardia trixago | Trixago Bartsia |
| Bellevalia romana | Roman Squill |
| Bellis annua | |
| Bellis perennis | Daisy |
| Bellium bellidioides | False Daisy |
| Berberis aggregata | Clustered Barberry |
| Berberis buxifolia | Box-leaved Barberry |
| Berberis darwinii | Darwin's Barberry |
| Berberis darwinii x empetrifolia = B. x stenophylla | Hedge Barberry |
| Berberis gagnepainii | Gagnepain's Barberry |
| Berberis gagnepainii x candidula = B. x hybrido-gagnepainii | |
| Berberis glaucocarpa | Great Barberry |
| Berberis hookeri | Hooker's Barberry |
| Berberis julianae | Chinese Barberry |
| Berberis manipurana | Manipur Barberry |
| Berberis pruinosa | |
| Berberis thunbergii | Thunberg's Barberry |
| Berberis verruculosa | |
| Berberis vulgaris | Barberry |
| Berberis vulgaris x thunbergii = B. x ottawensis | |
| Berberis wilsoniae | Mrs Wilson's Barberry |
| Bergenia ciliata | Hairy Bergenia |
| Bergenia cordifolia | Heart-leaved Bergenia |
| Bergenia crassifolia | Elephant-ears |
| Bergenia crassifolia x ciliata = B. x schmidtii | |
| Bergenia purpurascens | |
| Berkheya heterophylla | |
| Berkheya pinnatifida | |
| Berkheya rigida | African Thistle |
| Berteroa incana | Hoary Alison |
| Berula erecta | Lesser Water-Parsnip |
| Beta trigyna | Caucasian Beet |
| Beta vulgaris | Beet |
| Beta vulgaris ssp. cicla | Foliage Beet |
| Beta vulgaris ssp. maritima | Sea Beet |
| Beta vulgaris ssp. vulgaris | Root Beet |
| Betonica officinalis | Betony |
| Betula nana | Dwarf Birch |
| Betula papyrifera | Paper Birch |
| Betula pendula | Silver Birch |
| Betula pendula x pubescens = B. x aurata | |
| Betula pubescens | Downy Birch |
| Betula pubescens ssp. pubescens | |
| Betula pubescens ssp. tortuosa | |
| Betula pubescens x nana = B. x intermedia | |
| Bidens aristosa | Western Tickseed |
| Bidens bipinnata | Spanish-needles |
| Bidens biternata | |
| Bidens camporum | |
| Bidens cernua | Nodding Bur-Marigold |
| Bidens connata | London Bur-Marigold |
| Bidens ferulifolia | Fern-leaved Beggarticks |
| Bidens frondosa | Beggarticks |
| Bidens laevis | Larger Bur-marigold |
| Bidens pilosa | Black-jack |
| Bidens subalternans | |
| Bidens tenuisecta | |
| Bidens tripartita | Trifid Bur-Marigold |
| Bidens vulgata | Tall Beggarticks |
| Bifora radians | |
| Bifora testiculata | |
| Biscutella auriculata | |
| Biscutella cichoriifolia | Chicory-leaved Buckler-mustard |
| Biscutella laevigata | Buckler-mustard |
| Biserrula pelecinus | |
| Bivonaea lutea | |
| Blackstonia perfoliata | Yellow-wort |
| Blechnum cordatum | Chilean Hard-fern |
| Blechnum penna-marina | Antarctic Hard-fern |
| Blechnum spicant | Hard-Fern |
| Bletilla striata | Hyacinth Orchid |
| Blumenbachia hieronymii | |
| Blumenbachia insignis | |
| Blysmus compressus | Flat-sedge |
| Blysmus rufus | Saltmarsh Flat-Sedge |
| Boissiera squarrosa | |
| Bolboschoenus maritimus | Sea Club-Rush |
| Boltonia asteroides | False Chamomile |
| Bombycilaena erecta | Micropus |
| Borago officinalis | Borage |
| Borago pygmaea | Slender Borage |
| Boreava orientalis | |
| Borreria verticillata | |
| Bothriochloa decipiens | |
| Bothriochloa insculpta | |
| Bothriochloa ischaemum | |
| Bothriochloa macra | |
| Botrychium lunaria | Moonwort |
| Bouteloua curtipendula | Side-oats Grama |
| Bowlesia incana | |
| Brachiaria deflexa | |
| Brachiaria eruciformis | |
| Brachiaria gilesii | |
| Brachiaria marlothii | |
| Brachiaria platyphylla | Broad-leaved Signal-grass |
| Brachyglottis compacta x laxifolia = B. 'Sunshine' | Shrub Ragwort |
| Brachyglottis monroi | Monro's Ragwort |
| Brachyglottis repanda | Hedge Ragwort |
| Brachypodium distachyon | Stiff Brome |
| Brachypodium pinnatum | Heath False-brome |
| Brachypodium pinnatum agg. | |
| Brachypodium retusum | |
| Brachypodium rupestre | Tor-grass |
| Brachypodium sylvaticum | False-brome |
| Brachyscome ciliaris | Variable Daisy |
| Brachyscome graminea | |
| Brachyscome iberidifolia | Swan River Daisy |
| Brachyscome perpusilla | Tiny Daisy |
| Brassica barrelieri | |
| Brassica carinata | Ethiopian Rape |
| Brassica elongata | Long-stalked Rape |
| Brassica fruticulosa | Twiggy Turnip |
| Brassica juncea | Chinese Mustard |
| Brassica napus | Rape |
| Brassica napus ssp. oleifera | Oil-Seed Rape |
| Brassica napus ssp. rapifera | Swede |
| Brassica napus x rapa = B. x harmsiana | |
| Brassica nigra | Black Mustard |
| Brassica oleracea | Wild Cabbage |
| Brassica rapa | Turnip |
| Brassica rapa ssp. campestris | Wild Turnip |
| Brassica rapa ssp. oleifera | Turnip-rape |
| Brassica rapa ssp. rapa | Turnip |
| Brassica repanda | |
| Brassica tournefortii | Pale Cabbage |
| Briquetia spicata | |
| Briza humilis | |
| Briza maxima | Greater Quaking-Grass |
| Briza media | Quaking-Grass |
| Briza minor | Lesser Quaking-grass |
| Bromopsis benekenii | Lesser Hairy-brome |
| Bromopsis ciliata | |
| Bromopsis erecta | Upright Brome |
| Bromopsis inermis | Hungarian Brome |
| Bromopsis inermis ssp. inermis | |
| Bromopsis inermis ssp. pumpelliana | |
| Bromopsis ramosa | Hairy-Brome |
| Bromus alopecuros | |
| Bromus arduennensis | |
| Bromus arvensis | Field Brome |
| Bromus brachystachys | |
| Bromus briziformis | |
| Bromus commutatus | Meadow Brome |
| Bromus danthoniae | |
| Bromus grossus | |
| Bromus hordeaceus | |
| Bromus hordeaceus ssp. ferronii | Least Soft-brome |
| Bromus hordeaceus ssp. hordeaceus | Common Soft-brome |
| Bromus hordeaceus ssp. longipedicellatus | |
| Bromus hordeaceus ssp. molliformis | Divergent Soft-brome |
| Bromus hordeaceus ssp. thominei | Sand Soft-brome |
| Bromus hordeaceus x lepidus = B. x pseudothominei | Lesser Soft-brome |
| Bromus intermedius | |
| Bromus interruptus | Interrupted Brome |
| Bromus japonicus | Thunberg's Brome |
| Bromus lanceolatus | Large-headed Brome |
| Bromus lepidus | Slender Soft-brome |
| Bromus pectinatus | |
| Bromus pseudosecalinus | Smith's Brome |
| Bromus racemosus | Smooth Brome |
| Bromus scoparius | |
| Bromus secalinus | Rye Brome |
| Bromus squarrosus | |
| Bromus trinii | |
| Browallia americana | |
| Browallia speciosa | Bush-violet |
| Brunnera macrophylla | Great Forget-me-Not |
| Bryonia dioica | White Bryony |
| Buddleja alternifolia | Alternate-Leaved Butterfly-Bush |
| Buddleja davidii | Butterfly-Bush |
| Buddleja davidii x globosa = B. x weyeriana | Weyer's Butterfly-Bush |
| Buddleja globosa | Orange-Ball-Tree |
| Buddleja lindleyana | |
| Bulbostylis humilis | |
| Bulbostylis striatella | |
| Bunias erucago | Southern Warty-cabbage |
| Bunias orientalis | Warty-cabbage |
| Bunium bulbocastanum | Great Pignut |
| Buphthalmum salicifolium | |
| Bupleurum baldense | Small Hare's-ear |
| Bupleurum croceum | |
| Bupleurum falcatum | Sickle-leaved Hare's-ear |
| Bupleurum fruticosum | Shrubby Hare's-ear |
| Bupleurum nodiflorum | |
| Bupleurum odontites | |
| Bupleurum petraeum | Rock Hare's-ear |
| Bupleurum rotundifolium | Thorow-wax |
| Bupleurum semicompositum | |
| Bupleurum subovatum | False Thorow-wax |
| Bupleurum tenuissimum | Slender Hare's-ear |
| Butomus umbellatus | Flowering-Rush |
| Buxus balearica | Balearic Box |
| Buxus sempervirens | Box |
| Cabomba caroliniana | Carolina Water-shield |
| Cachrys uechtritzii | |
| Caesalpinia spinosa | Tara |
| Cakile maritima | Sea Rocket |
| Cakile maritima ssp. integrifolia | |
| Calamagrostis canescens | Purple Small-reed |
| Calamagrostis canescens x stricta = C. x gracilescens | |
| Calamagrostis epigejos | Wood Small-reed |
| Calamagrostis epigejos x Ammophila arenaria = X Calammophila baltica | Purple Marram |
| Calamagrostis purpurea | Scandinavian Small-reed |
| Calamagrostis purpurea ssp. phragmitoides | |
| Calamagrostis scotica | Scottish Small-reed |
| Calamagrostis stricta | Narrow Small-reed |
| Calandrinia ciliata | Red-maids |
| Calandrinia umbellata | Rock Purslane |
| Calceolaria biflora | |
| Calceolaria chelidonioides | Slipperwort |
| Calceolaria integrifolia | Bush Slipperwort |
| Calceolaria x herbeohybrida | Florists' Slipperwort |
| Caldesia parnassiifolia | Parnassus-leaved Water-plantain |
| Calendula arvensis | Field Marigold |
| Calendula officinalis | Pot Marigold |
| Calepina irregularis | White Ball-mustard |
| Calla palustris | Bog Arum |
| Callistephus chinensis | China Aster |
| Callitriche brutia | Pedunculate Water-starwort |
| Callitriche hamulata | Intermediate Water-starwort |
| Callitriche hamulata agg. | |
| Callitriche hermaphroditica | Autumnal Water-starwort |
| Callitriche obtusangula | Blunt-fruited Water-starwort |
| Callitriche palustris | Narrow-fruited Water-starwort |
| Callitriche platycarpa | Various-leaved Water-starwort |
| Callitriche stagnalis | Common Water-Starwort |
| Callitriche truncata | Short-leaved Water-starwort |
| Callitriche truncata ssp. occidentalis | |
| Calluna vulgaris | Heather |
| Calocedrus decurrens | Californian Incense-cedar |
| Calocephalus knappii | |
| Calotis cuneifolia | Bur-daisy |
| Calotis dentex | White Bur-daisy |
| Calotis hispidula | Hairy Bur-daisy |
| Calotis lappulacea | Yellow Bur-daisy |
| Caltha palustris | Marsh Marigold |
| Calycadenia multiglandulosa | Sticky Calycadenia |
| Calypso bulbosa | Calypso |
| Calystegia pulchra | Hairy Bindweed |
| Calystegia pulchra x silvatica = C. x howittiorum | |
| Calystegia sepium | Hedge Bindweed |
| Calystegia sepium agg. | |
| Calystegia sepium ssp. americana | |
| Calystegia sepium ssp. roseata | |
| Calystegia sepium ssp. sepium | |
| Calystegia sepium ssp. spectabilis | |
| Calystegia sepium x pulchra = C. x scanica | |
| Calystegia sepium x silvatica = C. x lucana | |
| Calystegia silvatica | Large Bindweed |
| Calystegia silvatica ssp. disjuncta | |
| Calystegia silvatica ssp. fraterniflora | |
| Calystegia silvatica ssp. silvatica | |
| Calystegia soldanella | Sea Bindweed |
| Camassia quamash | Common Camash |
| Camelina alyssum | |
| Camelina hispida | |
| Camelina macrocarpa | |
| Camelina microcarpa | Lesser Gold-of-pleasure |
| Camelina rumelica | |
| Camelina sativa | Gold-of-pleasure |
| Campanula alliariifolia | Cornish Bellflower |
| Campanula bononiensis | Pale Bellflower |
| Campanula carpatica | Tussock Bellflower |
| Campanula cochleariifolia | Fairy's-thimble |
| Campanula fragilis | Italian Bellflower |
| Campanula garganica | Adriatic Bellflower |
| Campanula glomerata | Clustered Bellflower |
| Campanula glomerata ssp. elliptica | |
| Campanula glomerata ssp. glomerata | |
| Campanula lactiflora | Milky Bellflower |
| Campanula latifolia | Giant Bellflower |
| Campanula medium | Canterbury-bells |
| Campanula patula | Spreading Bellflower |
| Campanula persicifolia | Peach-Leaved Bellflower |
| Campanula portenschlagiana | Adria Bellflower |
| Campanula poscharskyana | Trailing Bellflower |
| Campanula pyramidalis | Chimney Bellflower |
| Campanula rapunculoides | Creeping Bellflower |
| Campanula rapunculus | Rampion Bellflower |
| Campanula rhomboidalis | Broad-leaved Harebell |
| Campanula rotundifolia | Harebell |
| Campanula trachelium | Nettle-Leaved Bellflower |
| Campsis radicans | Trumpet-creeper |
| Canna indica | Indian-shot |
| Cannabis sativa | Hemp |
| Capnophyllum peregrinum | |
| Capsella bursa-pastoris | Shepherd's-Purse |
| Capsella bursa-pastoris x rubella = C. x gracilis | |
| Capsella rubella | Pink Shepherd's-purse |
| Capsicum annuum | Sweet Pepper |
| Caragana arborescens | Siberian Pea-tree |
| Cardamine amara | Large Bitter-cress |
| Cardamine bulbifera | Coralroot |
| Cardamine chelidonia | |
| Cardamine corymbosa | New-Zealand Bitter-cress |
| Cardamine flexuosa | Wavy Bitter-cress |
| Cardamine flexuosa x hirsuta = C. x zahlbruckneriana | |
| Cardamine glanduligera | |
| Cardamine heptaphylla | Pinnate Coralroot |
| Cardamine hirsuta | Hairy Bitter-cress |
| Cardamine impatiens | Narrow-leaved Bitter-cress |
| Cardamine kitaibelii | Kitaibel's Bitter-cress |
| Cardamine laciniata | Cut-leaved Bitter-cress |
| Cardamine pentaphyllos | Five-leaflet Bitter-cress |
| Cardamine pratensis | Cuckooflower |
| Cardamine pratensis x flexuosa = C. x fringsii | |
| Cardamine raphanifolia | Greater Cuckooflower |
| Cardamine trifolia | Trefoil Cress |
| Cardiospermum halicacabum | |
| Carduncellus caeruleus | |
| Carduus argentatus | |
| Carduus chrysacanthus | |
| Carduus crispus | Welted Thistle |
| Carduus crispus ssp. multiflorus | |
| Carduus crispus x nutans = C. x stangii | |
| Carduus hamulosus | |
| Carduus leucophyllus | |
| Carduus macrocephalus | Giant Thistle |
| Carduus nigrescens | |
| Carduus nutans | Musk Thistle |
| Carduus pycnocephalus | Plymouth Thistle |
| Carduus tenuiflorus | Slender Thistle |
| Carduus thoermeri | |
| Carduus vivariensis | |
| Carex acuta | Slender Tufted-sedge |
| Carex acuta x elata = C. x prolixa | |
| Carex acuta x nigra | |
| Carex acutiformis | Lesser Pond-Sedge |
| Carex acutiformis x acuta = C. x subgracilis | |
| Carex acutiformis x riparia = C. x sooi | |
| Carex acutiformis x vesicaria = C. x ducellieri | |
| Carex appressa | Tall Sedge |
| Carex appropinquata | Fibrous Tussock-sedge |
| Carex aquatilis | Water Sedge |
| Carex aquatilis x acuta | |
| Carex aquatilis x bigelowii = C. x limula | |
| Carex aquatilis x nigra = C. x hibernica | |
| Carex arenaria | Sand Sedge |
| Carex atrata | Black Alpine-sedge |
| Carex atrofusca | Scorched Alpine-sedge |
| Carex bicolor | Bicoloured Sedge |
| Carex bigelowii | Stiff Sedge |
| Carex binervis | Green-ribbed Sedge |
| Carex binervis x punctata | |
| Carex binervis x viridula = C. x corstorphinei | |
| Carex brunnea | |
| Carex buchananii | Silver-spiked Sedge |
| Carex buxbaumii | Club Sedge |
| Carex capillaris | Hair Sedge |
| Carex capitata | |
| Carex caryophyllea | Spring-sedge |
| Carex chordorrhiza | String Sedge |
| Carex crawfordii | Crawford's Sedge |
| Carex curta | White Sedge |
| Carex davalliana | Davall's Sedge |
| Carex demissa | Common Yellow-sedge |
| Carex depauperata | Starved Wood-sedge |
| Carex devia | |
| Carex deweyana | |
| Carex diandra | Lesser Tussock-sedge |
| Carex digitata | Fingered Sedge |
| Carex dioica | Dioecious Sedge |
| Carex distans | Distant Sedge |
| Carex distans x extensa = C. x tornabenii | |
| Carex distans x hostiana = C. x muelleriana | |
| Carex distans x viridula = C. x luteola | |
| Carex disticha | Brown Sedge |
| Carex divisa | Divided Sedge |
| Carex divulsa | |
| Carex divulsa ssp. divulsa | Grey Sedge |
| Carex divulsa ssp. leersii | Many-leaved Sedge |
| Carex divulsa x remota = C. x emmae | |
| Carex echinata | Star Sedge |
| Carex echinata x curta = C. x biharica | |
| Carex echinata x dioica = C. x gaudiniana | |
| Carex elata | Tufted-sedge |
| Carex elongata | Elongated Sedge |
| Carex ericetorum | Rare Spring-sedge |
| Carex extensa | Long-Bracted Sedge |
| Carex filiformis | Downy-fruited Sedge |
| Carex flacca | Glaucous Sedge |
| Carex flagellifera | |
| Carex flava | Large Yellow-sedge |
| Carex flava x viridula = C. x alsatica | |
| Carex glacialis | |
| Carex hirta | Hairy Sedge |
| Carex hirta x vesicaria = C. x grossii | |
| Carex hostiana | Tawny Sedge |
| Carex hostiana x viridula = C. x fulva | |
| Carex hubbardii | |
| Carex humilis | Dwarf Sedge |
| Carex inversa | Knob Sedge |
| Carex lachenalii | Hare's-foot Sedge |
| Carex lachenalii x curta = C. x helvola | |
| Carex laevigata | Smooth-stalked Sedge |
| Carex laevigata x binervis = C. x deserta | |
| Carex laevigata x viridula | |
| Carex lasiocarpa | Slender Sedge |
| Carex lasiocarpa x riparia = C. x evoluta | |
| Carex lepidocarpa | Long-stalked Yellow-sedge |
| Carex limosa | Bog-sedge |
| Carex longebrachiata | Drooping Sedge |
| Carex magellanica | Tall Bog-sedge |
| Carex magellanica ssp. irrigua | |
| Carex maritima | Curved Sedge |
| Carex microglochin | Bristle Sedge |
| Carex montana | Soft-leaved Sedge |
| Carex muricata | |
| Carex muricata ssp. muricata | Large-fruited Prickly-sedge |
| Carex muricata ssp. pairae | Small-fruited Prickly-sedge |
| Carex muricata x divulsa | |
| Carex nigra | Common Sedge |
| Carex nigra x bigelowii = C. x decolorans | |
| Carex nigra x elata = C. x turfosa | |
| Carex norvegica | Close-headed Alpine-sedge |
| Carex oederi | Small-fruited Yellow-sedge |
| Carex ornithopoda | Bird's-foot Sedge |
| Carex otrubae | False Fox Sedge |
| Carex otrubae x divulsa | |
| Carex otrubae x remota = C. x pseudoaxillaris | |
| Carex ovalis | Oval Sedge |
| Carex pallescens | Pale Sedge |
| Carex panicea | Carnation Sedge |
| Carex paniculata | Greater Tussock-sedge |
| Carex paniculata x appropinquata = C. x rotae | |
| Carex paniculata x curta = C. x ludibunda | |
| Carex paniculata x diandra = C. x beckmannii | |
| Carex paniculata x remota = C. x boenninghauseniana | |
| Carex pauciflora | Few-flowered Sedge |
| Carex pendula | Pendulous Sedge |
| Carex pilulifera | Pill Sedge |
| Carex pseudocyperus | Cyperus Sedge |
| Carex pseudocyperus x rostrata = C. x justi-schmidtii | |
| Carex pulicaris | Flea Sedge |
| Carex punctata | Dotted Sedge |
| Carex rariflora | Mountain Bog-sedge |
| Carex recta | Estuarine Sedge |
| Carex recta x aquatilis = C. x grantii | |
| Carex remota | Remote Sedge |
| Carex riparia | Greater Pond-sedge |
| Carex riparia x vesicaria = C. x csomadensis | |
| Carex rostrata | Bottle Sedge |
| Carex rostrata x vesicaria = C. x involuta | |
| Carex rupestris | Rock Sedge |
| Carex salina | Saltmarsh Sedge |
| Carex saxatilis | Russet Sedge |
| Carex saxatilis x viridula | |
| Carex secta | |
| Carex solandri | |
| Carex spicata | Spiked Sedge |
| Carex strigosa | Thin-spiked Wood-sedge |
| Carex sylvatica | Wood-sedge |
| Carex tereticaulis | |
| Carex trinervis | Three-nerved Sedge |
| Carex vaginata | Sheathed Sedge |
| Carex vesicaria | Bladder-sedge |
| Carex vesicaria x saxatilis = C. x grahamii | Mountain Bladder-sedge |
| Carex virgata | |
| Carex viridula | |
| Carex vulpina | True Fox-sedge |
| Carex vulpinoidea | American Fox-sedge |
| Carlina acaulis | |
| Carlina vulgaris | Carline Thistle |
| Carpinus betulus | Hornbeam |
| Carpobrotus acinaciformis | Sally-my-handsome |
| Carpobrotus edulis | Hottentot-Fig |
| Carpobrotus glaucescens | Angular Sea-fig |
| Carrichtera annua | Cress Rocket |
| Carthamus dentatus | |
| Carthamus lanatus | Downy Safflower |
| Carthamus oxyacanthus | |
| Carthamus tenuis | |
| Carthamus tinctorius | Safflower |
| Carum carvi | Caraway |
| Carum verticillatum | Whorled Caraway |
| Carya cordiformis | Bitternut Hickory |
| Carya ovata | Shagbark Hickory |
| Caryopteris incana x mongholica = C. x clandonensis | Bluebeard |
| Cassia fistula | Purging Cassia |
| Cassinia fulvida | Golden-bush |
| Castanea crenata | Japanese Chestnut |
| Castanea sativa | Sweet Chestnut |
| Castellia tuberculosa | |
| Castilleja coccinea | |
| Catabrosa aquatica | Whorl-grass |
| Catalpa bignonioides | Indian-bean-tree |
| Catananche caerulea | Blue Cupidone |
| Catapodium marinum | Sea Fern-grass |
| Catapodium rigidum | Fern-grass |
| Catapodium rigidum ssp. hemipoa | |
| Catapodium rigidum x marinum | |
| Caucalis bischoffii | |
| Caucalis platycarpos | Small Bur-parsley |
| Caulophyllum thalictroides | Blue Cohosh |
| Caylusea hexagyna | |
| Cedronella canariensis | Canary Islands Balm |
| Cedrus atlantica | Atlas Cedar |
| Cedrus deodara | Deodar |
| Cedrus libani | Cedar-of-Lebanon |
| Celastrus orbiculatus | Staff-vine |
| Celosia cristata | |
| Celosia trigyna | |
| Cenchrus ciliaris | Buffel-grass |
| Cenchrus echinatus | Spiny Sandbur |
| Cenchrus incertus | |
| Cenchrus longispinus | |
| Cenchrus pennisetiformis | |
| Cenchrus setigerus | |
| Centaurea apiculata | |
| Centaurea aspera | Rough Star-thistle |
| Centaurea atropurpurea | |
| Centaurea bruguieriana | |
| Centaurea calcitrapa | Red Star-Thistle |
| Centaurea centauroides | |
| Centaurea cheiranthifolia | |
| Centaurea cineraria | |
| Centaurea cyanus | Cornflower |
| Centaurea dalmatica | |
| Centaurea dealbata | |
| Centaurea debeauxii | Slender Knapweed |
| Centaurea debeauxii ssp. nemoralis | |
| Centaurea depressa | |
| Centaurea diffusa | |
| Centaurea diluta | Lesser Star-thistle |
| Centaurea eriophora | |
| Centaurea hyalolepis | |
| Centaurea iberica | Iberian Star-thistle |
| Centaurea intybacea | |
| Centaurea jacea | Brown Knapweed |
| Centaurea leucophaea | Whitish-leaved Knapweed |
| Centaurea macrocephala | Giant Knapweed |
| Centaurea maculosa | Spotted Knapweed |
| Centaurea melitensis | Maltese Star-thistle |
| Centaurea montana | Perennial Cornflower |
| Centaurea napifolia | |
| Centaurea nicaeensis | |
| Centaurea nigra | Common Knapweed |
| Centaurea nigra x jacea = C. x gerstlaueri | Hybrid Knapweed |
| Centaurea orientalis | |
| Centaurea paniculata | Jersey Knapweed |
| Centaurea patula | |
| Centaurea pullata | |
| Centaurea rhenana | Panicled Knapweed |
| Centaurea scabiosa | Greater Knapweed |
| Centaurea solstitialis | Yellow Star-thistle |
| Centaurea spinosa | |
| Centaurea stenolepis | |
| Centaurea trichocephala | |
| Centaurea triumfetti | |
| Centaurea verutum | |
| Centaurium erythraea | Common Centaury |
| Centaurium erythraea x littorale = C. x intermedium | |
| Centaurium erythraea x pulchellum | |
| Centaurium littorale | Seaside Centaury |
| Centaurium pulchellum | Lesser Centaury |
| Centaurium scilloides | Perennial Centaury |
| Centaurium tenuiflorum | Slender Centaury |
| Centipeda minima | Spreading Sneezeweed |
| Centranthus calcitrapae | Annual Valerian |
| Centranthus macrosiphon | Spanish Valerian |
| Centranthus ruber | Red Valerian |
| Centunculus minimus | Chaffweed |
| Cephalanthera damasonium | White Helleborine |
| Cephalanthera damasonium x longifolia = C. x schulzei | |
| Cephalanthera longifolia | Narrow-Leaved Helleborine |
| Cephalanthera rubra | Red Helleborine |
| Cephalaria alpina | Alpine Scabious |
| Cephalaria gigantea | Giant Scabious |
| Cephalaria syriaca | |
| Cephalaria transylvanica | |
| Cephalotaxus fortunei | Chinese Plum-yew |
| Cephalotaxus harringtonia | Japanese Plum-yew |
| Cerastium alpinum | Alpine Mouse-ear |
| Cerastium alpinum ssp. lanatum | |
| Cerastium alpinum x fontanum = C. x symei | |
| Cerastium alpinum x nigrescens | |
| Cerastium arvense | Field Mouse-Ear |
| Cerastium arvense x fontanum = C. x pseudoalpinum | |
| Cerastium arvense x tomentosum | |
| Cerastium brachypetalum | Grey Mouse-ear |
| Cerastium cerastoides | Starwort Mouse-ear |
| Cerastium dichotomum | |
| Cerastium diffusum | Sea Mouse-Ear |
| Cerastium fontanum | Common Mouse-ear |
| Cerastium fontanum ssp. holosteoides | |
| Cerastium fontanum ssp. scoticum | |
| Cerastium fontanum ssp. vulgare | |
| Cerastium glomeratum | Sticky Mouse-ear |
| Cerastium ligusticum | |
| Cerastium nigrescens | Arctic Mouse-Ear |
| Cerastium nigrescens x fontanum = C. x richardsonii | |
| Cerastium pumilum | Dwarf Mouse-ear |
| Cerastium scaranii | Italian Mouse-ear |
| Cerastium semidecandrum | Little Mouse-ear |
| Cerastium tomentosum | Snow-in-Summer |
| Ceratocapnos claviculata | Climbing Corydalis |
| Ceratocephala falcata | |
| Ceratocephala testiculata | |
| Ceratochloa brevis | Patagonian Brome |
| Ceratochloa carinata | California Brome |
| Ceratochloa cathartica | Rescue Brome |
| Ceratochloa marginata | Western Brome |
| Ceratochloa staminea | Southern Brome |
| Ceratonia siliqua | Carob |
| Ceratophyllum demersum | Rigid Hornwort |
| Ceratophyllum submersum | Soft Hornwort |
| Ceratostigma plumbaginoides | |
| Cercis siliquastrum | Judas-tree |
| Cerinthe glabra | Smooth Honeywort |
| Cerinthe major | Greater Honeywort |
| Cerinthe minor | Lesser Honeywort |
| Chaenomeles cathayensis | |
| Chaenomeles japonica | Japanese Quince |
| Chaenomeles speciosa | Japanese Quince |
| Chaenomeles speciosa x japonica = C. x superba | |
| Chaenomeles x superba x cathayensis = C. x californica | |
| Chaenorhinum minus | Small Toadflax |
| Chaenorhinum origanifolium | Malling Toadflax |
| Chaenorhinum rubrifolium | |
| Chaerophyllum aromaticum | Broad-leaved Chervil |
| Chaerophyllum aureum | Golden Chervil |
| Chaerophyllum hirsutum | Hairy Chervil |
| Chaerophyllum temulum | Rough Chervil |
| Chaetosciadium trichospermum | |
| Chamaecrista nictitans | Sensitive Cassia |
| Chamaecyparis lawsoniana | Lawson's Cypress |
| Chamaecyparis obtusa | Hinoki Cypress |
| Chamaecyparis pisifera | Sawara Cypress |
| Chamaecytisus purpureus | Purple Broom |
| Chamaecytisus supinus | Clustered Broom |
| Chamaemelum mixtum | |
| Chamaemelum nobile | Chamomile |
| Chamerion angustifolium | Rosebay Willowherb |
| Chamorchis alpina | False Orchid |
| Chara aculeolata | Hedgehog Stonewort |
| Chara aspera | Rough Stonewort |
| Chara baltica | Baltic Stonewort |
| Chara braunii | Braun's Stonewort |
| Chara canescens | Bearded Stonewort |
| Chara connivens | Convergent Stonewort |
| Chara contraria | Opposite Stonewort |
| Chara contraria var. contraria | |
| Chara contraria var. hispidula | |
| Chara curta | Lesser Bearded Stonewort |
| Chara denudata | Naked Stonewort |
| Chara fragifera | Strawberry Stonewort |
| Chara globularis | Fragile Stonewort |
| Chara hispida | Bristly Stonewort |
| Chara intermedia | Intermediate Stonewort |
| Chara muscosa | Mossy Stonewort |
| Chara rudis | Rugged Stonewort |
| Chara tomentosa | Coral Stonewort |
| Chara virgata | Delicate Stonewort |
| Chara virgata var. annulata | |
| Chara virgata var. virgata | |
| Chara vulgaris | Common Stonewort |
| Chara vulgaris var. crassicaulis | |
| Chara vulgaris var. longibracteata | |
| Chara vulgaris var. papillata | |
| Chara vulgaris var. vulgaris | |
| Chasmanthe bicolor | Chasmanthe |
| Chasmanthium latifolium | |
| Chelidonium majus | Greater Celandine |
| Chenopodium acuminatum | |
| Chenopodium album | Fat-Hen |
| Chenopodium ambrosioides | Mexican-tea |
| Chenopodium antarcticum | |
| Chenopodium aristatum | |
| Chenopodium atriplicinum | Starry Goosefoot |
| Chenopodium auricomiforme | |
| Chenopodium berlandieri | Pitseed Goosefoot |
| Chenopodium bonus-henricus | Good-King-Henry |
| Chenopodium borbasioides | |
| Chenopodium botrys | Sticky Goosefoot |
| Chenopodium bushianum | Soyabean Goosefoot |
| Chenopodium capitatum | Strawberry-blite |
| Chenopodium carinatum | Keeled Goosefoot |
| Chenopodium carinatum x cristatum = C. x bontei | |
| Chenopodium chenopodioides | Saltmarsh Goosefoot |
| Chenopodium cristatum | Crested Goosefoot |
| Chenopodium desiccatum | Slimleaf Goosefoot |
| Chenopodium detestans | Fish-guts |
| Chenopodium ficifolium | Fig-leaved Goosefoot |
| Chenopodium foliosum | Strawberry Goosefoot |
| Chenopodium giganteum | Tree Spinach |
| Chenopodium glaucum | Oak-leaved Goosefoot |
| Chenopodium graveolens | |
| Chenopodium hircinum | Foetid Goosefoot |
| Chenopodium hybridum | Maple-leaved Goosefoot |
| Chenopodium macrospermum | |
| Chenopodium missouriense | Soya-bean Goosefoot |
| Chenopodium mucronatum | |
| Chenopodium murale | Nettle-leaved Goosefoot |
| Chenopodium nitrariaceum | Nitre Goosefoot |
| Chenopodium opulifolium | Grey Goosefoot |
| Chenopodium pallidicaule | |
| Chenopodium phillipsianum | |
| Chenopodium polyspermum | Many-seeded Goosefoot |
| Chenopodium probstii | Probst's Goosefoot |
| Chenopodium procerum | |
| Chenopodium pumilio | Clammy Goosefoot |
| Chenopodium purpurascens | Purple Goosefoot |
| Chenopodium quinoa | Quinoa |
| Chenopodium rostratum | |
| Chenopodium rubrum | Red Goosefoot |
| Chenopodium rugosum | |
| Chenopodium schraderianum | |
| Chenopodium solitarium | |
| Chenopodium strictum | Striped Goosefoot |
| Chenopodium subpalmatum | |
| Chenopodium suecicum | Swedish Goosefoot |
| Chenopodium urbicum | Upright Goosefoot |
| Chenopodium vulvaria | Stinking Goosefoot |
| Chevreulia sarmentosa | |
| Chiastophyllum oppositifolium | Lamb's-tail |
| Chimonobambusa marmorea | |
| Chimonobambusa quadrangularis | Square-stemmed Bamboo |
| Chionodoxa luciliae | Boissier's Glory-of-the-Snow |
| Chionodoxa nana | |
| Chionodoxa sardensis | Lesser Glory-of-the-snow |
| Chloris divaricata | Australian Rhodes-grass |
| Chloris pectinata | |
| Chloris pumilio | |
| Chloris pycnothrix | |
| Chloris radiata | |
| Chloris truncata | Windmill-grass |
| Chloris ventricosa | |
| Chloris virgata | Feathery Rhodes-grass |
| Chlorophytum comosum | Spider-plant |
| Choisya ternata | Mexican Orange |
| Chondrilla juncea | Skeletonweed |
| Chondrosum trifidum | Red Grama |
| Chorispora syriaca | |
| Chorispora tenella | |
| Chrozophora tinctoria | Turn-sole |
| Chrysocoma coma-aurea | Shrub Goldilocks |
| Chrysocoma tenuifolia | Fine-leaved Goldilocks |
| Chrysogonum virginianum | Golden-knee |
| Chrysosplenium alternifolium | Alternate-leaved Golden-saxifrage |
| Chrysosplenium oppositifolium | Opposite-leaved Golden-saxifrage |
| Cicendia filiformis | Yellow Centaury |
| Cicer arietinum | Chick Pea |
| Cicerbita alpina | Alpine Blue-Sowthistle |
| Cicerbita bourgaei | Pontic Blue-Sowthistle |
| Cicerbita macrophylla | Common Blue-Sowthistle |
| Cicerbita macrophylla ssp. uralensis | |
| Cicerbita plumieri | Hairless Blue-Sowthistle |
| Cichorium endivia | Endive |
| Cichorium intybus | Chicory |
| Ciclospermum leptophyllum | Slender Celery |
| Cicuta virosa | Cowbane |
| Cineraria aspera | |
| Cineraria burkei | |
| Cineraria geifolia | |
| Cineraria lobata | |
| Cineraria lyrata | |
| Circaea alpina | Alpine Enchanter's-nightshade |
| Circaea lutetiana | Enchanter's-nightshade |
| Circaea lutetiana x alpina = C. x intermedia | Upland Enchanter's-nightshade |
| Cirsium acaule | Dwarf Thistle |
| Cirsium acaule x arvense = C. x boulayi | |
| Cirsium acaule x palustre = C. x kirschlegeri | |
| Cirsium arvense | Creeping Thistle |
| Cirsium creticum | |
| Cirsium dissectum | Meadow Thistle |
| Cirsium dissectum x acaule = C. x woodwardii | |
| Cirsium dissectum x palustre = C. x forsteri | |
| Cirsium edule | Indian Thistle |
| Cirsium eriophorum | Woolly Thistle |
| Cirsium eriophorum x vulgare = C. x grandiflorum | |
| Cirsium erisithales | Yellow Thistle |
| Cirsium heterophyllum | Melancholy Thistle |
| Cirsium heterophyllum x palustre = C. x wankelii | |
| Cirsium italicum | |
| Cirsium monspessulanum | |
| Cirsium oleraceum | Cabbage Thistle |
| Cirsium palustre | Marsh Thistle |
| Cirsium palustre x arvense = C. x celakovskianum | |
| Cirsium rivulare | Brook Thistle |
| Cirsium tuberosum | Tuberous Thistle |
| Cirsium tuberosum x acaule = C. x medium | |
| Cirsium tuberosum x palustre = C. x semidecurrens | |
| Cirsium vulgare | Spear Thistle |
| Cirsium vulgare x acaule = C. x sabaudum | |
| Cirsium vulgare x palustre = C. x subspinuligerum | |
| Cistus albidus | Grey-leaved Cistus |
| Cistus albidus x crispus = C. x pulverulentus | |
| Cistus incanus | Hoary Rock-Rose |
| Cistus ladanifer | Gum Rock-rose |
| Cistus laurifolius | Laurel-leaved Cistus |
| Cistus populifolius x psilosepalus = C. x laxus | |
| Cistus populifolius x salviifolius = C. x corbariensis | Corbières Rock-rose |
| Cistus salviifolius | Sage-leaved Rock-rose |
| Citrullus colocynthis | Bitter Cucumber |
| Citrullus lanatus | Water Melon |
| Citrus auriantium | Orange |
| Citrus limon | Lemon |
| Citrus paradisi | Grapefruit |
| Citrus reticulata | Mandarin Orange |
| Cladanthus arabicus | |
| Cladium mariscus | Great Fen-sedge |
| Clarkia amoena | Godetia |
| Clarkia bottae | |
| Clarkia concinna | Red-ribbons |
| Clarkia pulchella | |
| Clarkia purpurea | |
| Clarkia quadrivulnera | |
| Clarkia unguiculata | Clarkia |
| Claytonia perfoliata | Springbeauty |
| Claytonia sibirica | Pink Purslane |
| Claytonia virginica | Virginia Springbeauty |
| Clematis armandii | |
| Clematis cirrhosa | Early Virgin's-bower |
| Clematis flammula | Virgin's-Bower |
| Clematis montana | Himalayan Clematis |
| Clematis tangutica | Orange-Peel Clematis |
| Clematis vitalba | Traveller's-Joy |
| Clematis viticella | Purple Clematis |
| Cleome gynandra | |
| Cleome serrulata | Rocky Mountain Beeplant |
| Cleome sesquiorgyalis | Spiderflower |
| Cleretum bellidiforme | Livingstone-daisy |
| Clerodendrum trichotomum | |
| Clethra alnifolia | Sweet Pepperbush |
| Clethra arborea | Lily-of-the-valley-tree |
| Clinopodium acinos | Basil Thyme |
| Clinopodium ascendens | Common Calamint |
| Clinopodium calamintha | Lesser Calamint |
| Clinopodium grandiflorum | Greater Calamint |
| Clinopodium menthifolium | Wood Calamint |
| Clinopodium rotundifolium | Round-leaved Calamint |
| Clinopodium vulgare | Wild Basil |
| Clypeola jonthlaspi | Disk Cress |
| Cnicus benedictus | Blessed Thistle |
| Cochlearia anglica | English Scurvygrass |
| Cochlearia anglica x officinalis = C. x hollandica | |
| Cochlearia danica | Danish Scurvygrass |
| Cochlearia megalosperma | Tall Scurvygrass |
| Cochlearia micacea | Mountain Scurvygrass |
| Cochlearia officinalis | Common Scurvygrass |
| Cochlearia officinalis agg. | |
| Cochlearia officinalis ssp. officinalis | |
| Cochlearia officinalis ssp. scotica | Scottish Scurvygrass |
| Cochlearia officinalis x danica | |
| Cochlearia pyrenaica | Pyrenean Scurvygrass |
| Cochlearia pyrenaica ssp. alpina | |
| Cochlearia pyrenaica ssp. pyrenaica | |
| Cochlearia pyrenaica x officinalis | |
| Coeloglossum viride | Frog Orchid |
| Coeloglossum viride x Dactylorhiza fuchsii = X Dactyloglossum mixtum | |
| Coeloglossum viride x Dactylorhiza maculata = X Dactyloglossum conigerum | |
| Coeloglossum viride x Dactylorhiza purpurella = X Dactyloglossum viridella | |
| Coincya hispida | Wallflower Cabbage |
| Coincya longirostra | |
| Coincya monensis | |
| Coincya monensis ssp. cheiranthos | Wallflower Cabbage |
| Coincya monensis ssp. monensis | Isle of Man Cabbage |
| Coincya wrightii | Lundy Cabbage |
| Coix lacryma-jobi | Job's-tears |
| Colchicum agrippinum | |
| Colchicum autumnale | Meadow Saffron |
| Colchicum byzantinum | |
| Colchicum variegatum | |
| Coleostephus myconis | |
| Coleus blumei | Painted-nettle |
| Collinsia heterophylla | Chinese-houses |
| Collomia biflora | |
| Collomia grandiflora | |
| Collomia linearis | |
| Colocasia esculenta | Taro |
| Colutea arborescens | Bladder Senna |
| Colutea arborescens x orientalis = C. x media | Orange Bladder-senna |
| Comarum palustre | Marsh Cinquefoil |
| Commelina coelestis | Blue Spiderwort |
| Commelina communis | |
| Commelina diffusa | Creeping Spiderwort |
| Commelina elliptica | Peruvian Spiderwort |
| Commelina virginica | |
| Conium maculatum | Hemlock |
| Conopodium majus | Pignut |
| Conringia austriaca | |
| Conringia orientalis | Hare's-ear Mustard |
| Consolida ajacis | Larkspur |
| Consolida orientalis | Eastern Larkspur |
| Consolida pubescens | |
| Consolida regalis | Forking Larkspur |
| Convallaria majalis | Lily-of-the-Valley |
| Convolvulus althaeoides | Mallow-leaved Bindweed |
| Convolvulus arvensis | Field Bindweed |
| Convolvulus betonicifolius | |
| Convolvulus erubescens | Australian Bindweed |
| Convolvulus pentapetaloides | |
| Convolvulus sabatius | Ground Blue-convolvulus |
| Convolvulus siculus | Small Blue-convolvulus |
| Convolvulus stachydifolius | |
| Convolvulus tricolor | Tricolour Convolvulus |
| Conyza blakei | |
| Conyza bonariensis | Argentine Fleabane |
| Conyza canadensis | Canadian Fleabane |
| Conyza canadensis x bonariensis | |
| Conyza floribunda | Bilbao's Fleabane |
| Conyza japonica | Japanese Fleabane |
| Conyza sumatrensis | Guernsey Fleabane |
| Coprosma repens | Tree Bedstraw |
| Corallorhiza trifida | Coralroot Orchid |
| Corchorus olitorius | Tossa Jute |
| Cordyline australis | Cabbage Palm |
| Coreopsis grandiflora | Large-flowered Tickseed |
| Coreopsis nuecensis | |
| Coreopsis tinctoria | Garden Tickseed |
| Coreopsis verticillata | Whorled Tickseed |
| Coriandrum sativum | Coriander |
| Coriandrum tordylium | |
| Corispermum hyssopifolium | Hyssop-leaved Bugseed |
| Corispermum leptopterum | Bugseed |
| Cornucopiae cucullatum | |
| Cornus alba | White Dogwood |
| Cornus alternifolia | Pagoda Dogwood |
| Cornus canadensis | Creeping Dogwood |
| Cornus capitata | Bentham's Dogwood |
| Cornus florida | Flowering Dogwood |
| Cornus kousa | |
| Cornus mas | Cornelian Cherry |
| Cornus sanguinea | Dogwood |
| Cornus sericea | Red-osier Dogwood |
| Cornus suecica | Dwarf Cornel |
| Coronilla coronata | Scorpion-vetch |
| Coronilla scorpioides | Annual Scorpion-vetch |
| Coronilla valentina | Shrubby Scorpion-vetch |
| Coronilla valentina ssp. glauca | |
| Correa backhouseana | Tasmanian-fuchsia |
| Corrigiola litoralis | Strapwort |
| Corrigiola telephiifolia | |
| Cortaderia richardii | Early Pampas-grass |
| Cortaderia selloana | Pampas-grass |
| Corydalis capnoides | Beaked Corydalis |
| Corydalis cava | Hollowroot |
| Corydalis cheilanthifolia | Fern-leaved Corydalis |
| Corydalis ophiocarpa | |
| Corydalis sempervirens | Harlequin Corydalis |
| Corydalis solida | Bird-in-a-bush |
| Corylus avellana | Hazel |
| Corylus avellana x maxima | |
| Corylus colurna | Turkish Hazel |
| Corylus maxima | Filbert |
| Corynephorus canescens | Grey Hair-grass |
| Cosmos bipinnatus | Mexican Aster |
| Cotinus coggygria | Smoke-tree |
| Cotoneaster acuminatus | |
| Cotoneaster adpressus | Creeping Cotoneaster |
| Cotoneaster affinis | Purpleberry Cotoneaster |
| Cotoneaster amoenus | Beautiful Cotoneaster |
| Cotoneaster apiculatus | Apiculate Cotoneaster |
| Cotoneaster ascendens | Ascending Cotoneaster |
| Cotoneaster astrophoros | Starry Cotoneaster |
| Cotoneaster atropurpureus | Purple-flowered Cotoneaster |
| Cotoneaster bacillaris | Open-fruited Cotoneaster |
| Cotoneaster boisianus | Bois's Cotoneaster |
| Cotoneaster bradyi | Brady's Cotoneaster |
| Cotoneaster bullatus | Hollyberry Cotoneaster |
| Cotoneaster buxifolius | Box-leaved Cotoneaster |
| Cotoneaster calocarpus | Sikang Cotoneaster |
| Cotoneaster cambricus | Wild Cotoneaster |
| Cotoneaster cashmiriensis | Kashmir Cotoneaster |
| Cotoneaster cinerascens | |
| Cotoneaster cochleatus | Yunnan Cotoneaster |
| Cotoneaster congestus | Congested Cotoneaster |
| Cotoneaster conspicuus | Tibetan Cotoneaster |
| Cotoneaster cooperi | Cooper's Cotoneaster |
| Cotoneaster dammeri | Bearberry Cotoneaster |
| Cotoneaster dammeri x conspicuus = C. x suecicus | Swedish Cotoneaster |
| Cotoneaster dielsianus | Diels' Cotoneaster |
| Cotoneaster divaricatus | Spreading Cotoneaster |
| Cotoneaster ellipticus | Lindley's Cotoneaster |
| Cotoneaster fangianus | Fang's Cotoneaster |
| Cotoneaster foveolatus | |
| Cotoneaster franchetii | Franchet's Cotoneaster |
| Cotoneaster frigidus | Tree Cotoneaster |
| Cotoneaster frigidus x salicifolius = C. x watereri | Waterer's Cotoneaster |
| Cotoneaster glabratus | Glabrous Cotoneaster |
| Cotoneaster glaucophyllus | Glaucous Cotoneaster |
| Cotoneaster henryanus | Henry's Cotoneaster |
| Cotoneaster hissaricus | Circular-leaved Cotoneaster |
| Cotoneaster hjelmqvistii | Hjelmqvist's Cotoneaster |
| Cotoneaster hodjingensis | Earthquake Cotoneaster |
| Cotoneaster horizontalis | Wall Cotoneaster |
| Cotoneaster hsingshangensis | Hsing-Shan Cotoneaster |
| Cotoneaster hummelii | Hummel's Cotoneaster |
| Cotoneaster hupehensis | |
| Cotoneaster hurusawaianus | Hurusawa's Cotoneaster |
| Cotoneaster hylmoei | Hylmö's Cotoneaster |
| Cotoneaster ignescens | Firebird Cotoneaster |
| Cotoneaster ignotus | Black-grape Cotoneaster |
| Cotoneaster induratus | Hardy Cotoneaster |
| Cotoneaster insculptus | Engraved Cotoneaster |
| Cotoneaster integrifolius | Entire-Leaved Cotoneaster |
| Cotoneaster lacteus | Late Cotoneaster |
| Cotoneaster laetevirens | Ampfield Cotoneaster |
| Cotoneaster lidjiangensis | Lidjiang Cotoneaster |
| Cotoneaster lucidus | Shiny Cotoneaster |
| Cotoneaster mairei | Maire's Cotoneaster |
| Cotoneaster marginatus | Fringed Cotoneaster |
| Cotoneaster microphyllus | Small-leaved Cotoneaster |
| Cotoneaster monopyrenus | One-stoned Cotoneaster |
| Cotoneaster moupinensis | Moupin Cotoneaster |
| Cotoneaster mucronatus | Mucronate Cotoneaster |
| Cotoneaster nanshan | Dwarf Cotoneaster |
| Cotoneaster newryensis | |
| Cotoneaster nitens | Few-flowered Cotoneaster |
| Cotoneaster nitidus | Distichous Cotoneaster |
| Cotoneaster obscurus | Obscure Cotoneaster |
| Cotoneaster obtusus | Dartford Cotoneaster |
| Cotoneaster pannosus | Silverleaf Cotoneaster |
| Cotoneaster perpusillus | Slender Cotoneaster |
| Cotoneaster prostratus | Procumbent Cotoneaster |
| Cotoneaster pseudoambiguus | Kangting Cotoneaster |
| Cotoneaster radicans | Rooting Cotoneaster |
| Cotoneaster rehderi | Bullate Cotoneaster |
| Cotoneaster rotundifolius | Round-leaved Cotoneaster |
| Cotoneaster salicifolius | Willow-leaved Cotoneaster |
| Cotoneaster salicifolius x dammeri = C. 'Hybridus Pendulus' | Weeping Cotoneaster |
| Cotoneaster sanguineus | |
| Cotoneaster serotinus | Yuletide Cotoneaster |
| Cotoneaster shannanensis | Shannan Cotoneaster |
| Cotoneaster sherriffii | Sherriff's Cotoneaster |
| Cotoneaster silvestrei | |
| Cotoneaster simonsii | Himalayan Cotoneaster |
| Cotoneaster splendens | Showy Cotoneaster |
| Cotoneaster sternianus | Stern's Cotoneaster |
| Cotoneaster tengyuehensis | Tengyueh Cotoneaster |
| Cotoneaster thymifolius | Thyme-leaved Cotoneaster |
| Cotoneaster tomentellus | Short-felted Cotoneaster |
| Cotoneaster transens | Godalming Cotoneaster |
| Cotoneaster turbinatus | |
| Cotoneaster veitchii | Many-flowered Cotoneaster |
| Cotoneaster vestitus | |
| Cotoneaster villosulus | Lleyn Cotoneaster |
| Cotoneaster vilmorinianus | Vilmorin's Cotoneaster |
| Cotoneaster wardii | Ward's Cotoneaster |
| Cotoneaster zabelii | Cherryred Cotoneaster |
| Cotula anthemoides | |
| Cotula australis | Annual Buttonweed |
| Cotula bipinnata | Ferny Buttonweed |
| Cotula coronopifolia | Buttonweed |
| Cotula dioica | Hairless Leptinella |
| Cotula filifolia | |
| Cotula macroglossa | |
| Cotula pusilla | |
| Cotula sororia | |
| Cotula squalida | Leptinella |
| Cotula turbinata | |
| Cotula villosa | |
| Cotula zeyheri | |
| Cousinia tenella | |
| Crambe cordifolia | Greater Sea-kale |
| Crambe maritima | Sea Kale |
| Crambe orientalis | Oriental Sea-kale |
| Crassocephalum sarcobasis | |
| Crassula alata | |
| Crassula alata ssp. pharnaceoides | |
| Crassula aquatica | Pigmyweed |
| Crassula campestris | |
| Crassula colorata | Dense Pigmyweed |
| Crassula decumbens | Scilly Pigmyweed |
| Crassula helmsii | New-Zealand Pigmyweed |
| Crassula intricata | |
| Crassula natans | |
| Crassula peduncularis | Purple Pigmyweed |
| Crassula pubescens | Jersey Pigmyweed |
| Crassula pubescens ssp. radicans | |
| Crassula sarmentosa | Jade-tree |
| Crassula setulosa | |
| Crassula sieberiana | Austalian Pigmyweed |
| Crassula thunbergiana | |
| Crassula tillaea | Mossy Stonecrop |
| Crassula vaillantii | |
| Crataegus coccinea | Pear-fruited Cockspurthorn |
| Crataegus coccinioides | Large-flowered Cockspurthorn |
| Crataegus crus-galli | Cockspurthorn |
| Crataegus douglasii | Black Hawthorn |
| Crataegus elliptica | |
| Crataegus heterophylla | Various-leaved Hawthorn |
| Crataegus intricata | Lange's Thorn |
| Crataegus laevigata | Midland Hawthorn |
| Crataegus mollis | |
| Crataegus monogyna | Hawthorn |
| Crataegus monogyna x heterophylla | |
| Crataegus monogyna x laevigata = C. x media | |
| Crataegus nigra | Hungarian Thorn |
| Crataegus orientalis | Oriental Hawthorn |
| Crataegus persimilis | Broad-leaved Cockspurthorn |
| Crataegus punctata | Dotted Hawthorn |
| Crataegus sanguinea | |
| Crataegus submollis | Hairy Cockspurthorn |
| Crataegus succulenta | Round-fruited Cockspurthorn |
| Crataegus tanacetifolia | Tansy-leaved Thorn |
| Crataegus viridis | Southern Thorn |
| Crataegus x lavallei | Hybrid Cockspurthorn |
| Crepis alpina | |
| Crepis aurea | Golden Hawk's-beard |
| Crepis biennis | Rough Hawk's-beard |
| Crepis capillaris | Smooth Hawk's-Beard |
| Crepis foetida | Stinking Hawk's-beard |
| Crepis foetida ssp. commutata | |
| Crepis foetida ssp. foetida | |
| Crepis foetida ssp. rhoeadifolia | |
| Crepis mollis | Northern Hawk's-beard |
| Crepis nicaeensis | French Hawk's-beard |
| Crepis paludosa | Marsh Hawk's-beard |
| Crepis praemorsa | Leafless Hawk's-beard |
| Crepis pulchra | Small-flowered Hawk's-beard |
| Crepis rubra | Pink Hawk's-beard |
| Crepis sancta | |
| Crepis setosa | Bristly Hawk's-beard |
| Crepis suberostris | |
| Crepis tectorum | Narrow-leaved Hawk's-beard |
| Crepis vesicaria | Beaked Hawk's-beard |
| Crepis vesicaria ssp. taraxacifolia | |
| Crepis zacintha | |
| Crinum bulbispermum x moorei = C. x powellii | Powell's Cape Lily |
| Crithmum maritimum | Rock Samphire |
| Crithopsis delileana | |
| Crocosmia masoniorum | Giant Montbretia |
| Crocosmia masoniorum x pottsii x aurea | |
| Crocosmia paniculata | Aunt-Eliza |
| Crocosmia pottsii | Pott's Montbretia |
| Crocosmia pottsii x aurea = C. x crocosmiiflora | Montbretia |
| Crocus ancyrensis | Ankara Crocus |
| Crocus angustifolius x flavus = C. x stellaris | Yellow Crocus |
| Crocus biflorus | Silvery Crocus |
| Crocus biflorus ssp. adamii | |
| Crocus biflorus ssp. biflorus | |
| Crocus chrysanthus | Golden Crocus |
| Crocus chrysanthus x biflorus | |
| Crocus kotschyanus | Kotschy's Crocus |
| Crocus longiflorus | Italian Crocus |
| Crocus nudiflorus | Autumn Crocus |
| Crocus pulchellus | Hairy Crocus |
| Crocus sativus | Saffron Crocus |
| Crocus serotinus | Late Crocus |
| Crocus serotinus ssp. salzmannii | |
| Crocus sieberi | Sieber's Crocus |
| Crocus speciosus | Bieberstein's Crocus |
| Crocus tommasinianus | Early Crocus |
| Crocus vernus | Spring Crocus |
| Crocus vernus ssp. albiflorus | |
| Crocus vernus ssp. vernus | |
| Crocus vernus x tommasinianus | |
| Crocus versicolor | |
| Crucianella angustifolia | |
| Crucianella patula | |
| Cruciata articulata | |
| Cruciata laevipes | Crosswort |
| Crupina crupinastrum | |
| Crupina vulgaris | False Saw-wort |
| Crypsis aculeata | |
| Crypsis schoenoides | |
| Cryptogramma crispa | Parsley Fern |
| Cryptomeria japonica | Japanese Red-cedar |
| Ctenopsis cynosuroides | |
| Cucubalus baccifer | Berry Catchfly |
| Cucumis melo | Melon |
| Cucumis myriocarpus | Gooseberry Cucumber |
| Cucumis sativus | Cucumber |
| Cucurbita ficifolia | Fig-leaved Gourd |
| Cucurbita maxima | Pumpkin |
| Cucurbita pepo | Marrow |
| Cullen americanum | Scurfy Pea |
| Cuminum cyminum | Cumin |
| Cuphea llavea x procumbens = C. x purpurea | |
| Cupressus duclouxiana | Chinese Cypress |
| Cupressus goveniana | Californian Cypress |
| Cupressus macrocarpa | Monterey Cypress |
| Cupressus macrocarpa x Xanthocyparis nootkatensis = X Cuprocyparis leylandii | Leyland Cypress |
| Cupressus sempervirens | Italian Cypress |
| Cuscuta americana | |
| Cuscuta approximata | |
| Cuscuta australis | Australian Dodder |
| Cuscuta campestris | Yellow Dodder |
| Cuscuta epilinum | Flax Dodder |
| Cuscuta epithymum | Dodder |
| Cuscuta europaea | Greater Dodder |
| Cuscuta planiflora | |
| Cuscuta suaveolens | Lucerne Dodder |
| Cuspidia cernua | |
| Cutandia divaricata | |
| Cutandia maritima | |
| Cutandia memphitica | |
| Cyanopsis muricata | |
| Cyathea dealbata | Silver Tree-fern |
| Cyclamen coum | Eastern Sowbread |
| Cyclamen graecum | Greek Cyclamen |
| Cyclamen hederifolium | Sowbread |
| Cyclamen persicum | Florist's Cyclamen |
| Cyclamen repandum | Spring Sowbread |
| Cycloloma atriplicifolium | Winged Pigweed |
| Cydonia oblonga | Quince |
| Cymbalaria hepaticifolia | Corsican Toadflax |
| Cymbalaria longipes | |
| Cymbalaria muralis | Ivy-leaved Toadflax |
| Cymbalaria muralis ssp. muralis | |
| Cymbalaria muralis ssp. visianii | |
| Cymbalaria pallida | Italian Toadflax |
| Cynara cardunculus | Globe Artichoke |
| Cynodon aethiopicus | |
| Cynodon dactylon | Bermuda-grass |
| Cynodon incompletus | African Bermuda-grass |
| Cynodon transvaalensis | |
| Cynoglossum amabile | Chinese Hound's-tongue |
| Cynoglossum australe | Australian Hound's-tongue |
| Cynoglossum germanicum | Green Hound's-Tongue |
| Cynoglossum montanum | |
| Cynoglossum nervosum | Himalayan Hound's-tongue |
| Cynoglossum officinale | Hound's-tongue |
| Cynoglottis barrelieri | False Alkanet |
| Cynosurus cristatus | Crested Dogstail |
| Cynosurus echinatus | Rough Dog's-tail |
| Cynosurus elegans | |
| Cyperus albostriatus | |
| Cyperus brevifolius | Globe Kyllinga |
| Cyperus clarus | |
| Cyperus congestus | Dense Flat-sedge |
| Cyperus cyperinus | |
| Cyperus dactylotes | |
| Cyperus difformis | Variable Flat-sedge |
| Cyperus eragrostis | Pale Galingale |
| Cyperus erectus | |
| Cyperus esculentus | Yellow Nutsedge |
| Cyperus flavus | Cayenne Cyperus |
| Cyperus fuscus | Brown Galingale |
| Cyperus globulosus | Baldwin's Cyperus |
| Cyperus gunnii | Flecked Flat-sedge |
| Cyperus involucratus | |
| Cyperus longus | Galingale |
| Cyperus longus ssp. longus | |
| Cyperus longus ssp. tenuiflorus | |
| Cyperus luzulae | |
| Cyperus ovularis | Globose Cyperus |
| Cyperus reflexus | |
| Cyperus rigidifolius | |
| Cyperus rotundus | Purple Nutsedge |
| Cyperus rutilans | |
| Cyperus sesquiflorus | |
| Cyperus sporobolus | |
| Cyperus tenuis | |
| Cyperus ustulatus | Giant Umbrella-sedge |
| Cyperus vaginatus | Stiff-leaved Flat-sedge |
| Cyphomandra crassicaulis | Tree Tomato |
| Cypripedium calceolus | Lady's-slipper |
| Cyrtanthus elatus | Scarborough Lily |
| Cyrtomium falcatum | House Holly-fern |
| Cystopteris alpina | Alpine Bladder-fern |
| Cystopteris diaphana | Greenish Bladder-fern |
| Cystopteris dickieana | Dickie's Bladder-fern |
| Cystopteris fragilis | Brittle Bladder-Fern |
| Cystopteris montana | Mountain Bladder-fern |
| Cytisus battandieri | Pineapple Broom |
| Cytisus multiflorus | White Broom |
| Cytisus nigricans | Black Broom |
| Cytisus scoparius | Broom |
| Cytisus scoparius ssp. maritimus | Prostrate Broom |
| Cytisus scoparius ssp. scoparius | |
| Cytisus striatus | Hairy-fruited Broom |
| Daboecia cantabrica | St Dabeoc's Heath |
| Dactylis glomerata | Cock's-Foot |
| Dactylis glomerata ssp. glomerata | |
| Dactylis glomerata ssp. hispanica | |
| Dactylis polygama | Slender Cock's-foot |
| Dactyloctenium aegyptium | |
| Dactyloctenium radulans | Button-grass |
| Dactylorhiza ebudensis | Hebridean Marsh-orchid |
| Dactylorhiza fuchsii | Common Spotted-Orchid |
| Dactylorhiza fuchsii x incarnata = D. x kernerorum | |
| Dactylorhiza fuchsii x maculata = D. x transiens | |
| Dactylorhiza fuchsii x occidentalis | |
| Dactylorhiza fuchsii x praetermissa = D. x grandis | |
| Dactylorhiza fuchsii x purpurella = D. x venusta | |
| Dactylorhiza fuchsii x traunsteinerioides | |
| Dactylorhiza incarnata | Early Marsh-Orchid |
| Dactylorhiza incarnata ssp. coccinea | |
| Dactylorhiza incarnata ssp. cruenta | |
| Dactylorhiza incarnata ssp. gemmana | |
| Dactylorhiza incarnata ssp. incarnata | |
| Dactylorhiza incarnata ssp. ochroleuca | |
| Dactylorhiza incarnata ssp. pulchella | |
| Dactylorhiza incarnata x occidentalis | |
| Dactylorhiza incarnata x praetermissa = D. x wintoni | |
| Dactylorhiza incarnata x purpurella = D. x latirella | |
| Dactylorhiza incarnata x traunsteinerioides | |
| Dactylorhiza maculata | Heath Spotted-Orchid |
| Dactylorhiza maculata ssp. ericetorum | |
| Dactylorhiza maculata x incarnata = D. x carnea | |
| Dactylorhiza maculata x occidentalis = D. x dinglensis | |
| Dactylorhiza maculata x praetermissa = D. x hallii | |
| Dactylorhiza maculata x purpurella = D. x formosa | |
| Dactylorhiza maculata x traunsteinerioides | |
| Dactylorhiza occidentalis | Western Marsh-orchid |
| Dactylorhiza praetermissa | Southern Marsh-Orchid |
| Dactylorhiza praetermissa x purpurella = D. x insignis | |
| Dactylorhiza praetermissa x traunsteinerioides | |
| Dactylorhiza purpurella | Northern Marsh-Orchid |
| Dactylorhiza purpurella x ebudensis | |
| Dactylorhiza purpurella x occidentalis | |
| Dactylorhiza traunsteinerioides | Narrow-leaved Marsh-orchid |
| Dahlia x hortensis | Garden Dahlia |
| Dahlia pinnata | Dahlia |
| Damasonium alisma | Starfruit |
| Danthonia decumbens | Heath-grass |
| Danthonia montevidensis | |
| Daphne laureola | Spurge-Laurel |
| Daphne mezereum | Mezereon |
| Daphne mezereum x laureola = D. x houtteana | |
| Darmera peltata | Indian-Rhubarb |
| Dasypyrum villosum | |
| Datura ferox | Angel's-trumpets |
| Datura innoxia | Recurved Thorn-apple |
| Datura metel | |
| Datura stramonium | Thorn-Apple |
| Daucus carota | Carrot |
| Daucus carota ssp. carota | Wild Carrot |
| Daucus carota ssp. gummifer | Sea Carrot |
| Daucus carota ssp. maritimus | Mediterranean Carrot |
| Daucus carota ssp. sativus | Carrot |
| Daucus crinitus | |
| Daucus durieua | |
| Daucus glochidiatus | Australian Carrot |
| Daucus guttatus | |
| Daucus littoralis | |
| Daucus montanus | |
| Daucus muricatus | |
| Daucus pusillus | Rattle-snake-weed |
| Davallia bullata | Squirrel's-foot Fern |
| Davallia canariensis | Hare's-foot Fern |
| Davidia involucrata | Dove-tree |
| Delairea odorata | German-ivy |
| Delosperma burtoniae | |
| Delphinium elatum | Alpine Delphinium |
| Delphinium exaltatum | |
| Delphinium fissum | |
| Delphinium nudicaule | |
| Delphinium peregrinum | Violet Larkspur |
| Delphinium verdunense | |
| Delphinium x cultorum | Garden Delphinium |
| Dendranthema coreanum | Korean Chrysanthemum |
| Dendranthema x grandiflorum | Florists' Chrysanthemum |
| Dendranthema zawadskii | |
| Deschampsia cespitosa | |
| Deschampsia cespitosa ssp. alpina | Alpine Hair-grass |
| Deschampsia cespitosa ssp. cespitosa | Tufted Hair-grass |
| Deschampsia cespitosa ssp. parviflora | Small-flowered Hair-grass |
| Deschampsia danthonioides | |
| Deschampsia flexuosa | Wavy Hair-Grass |
| Deschampsia setacea | Bog Hair-grass |
| Descurainia pinnata | Tansy-mustard |
| Descurainia pulcherrima | |
| Descurainia richardsonii | Western Tansy-mustard |
| Descurainia sophia | Flixweed |
| Desfontainea spinosa | |
| Desmazeria philistaea | |
| Desmazeria sicula | |
| Desmodium varians | Slender Tick-trefoil |
| Deutzia purpurascens x sieboldiana = D. x elegantissima | |
| Deutzia scabra | Deutzia |
| Dianthus arenarius | Stone Pink |
| Dianthus armeria | Deptford Pink |
| Dianthus barbatus | Sweet-William |
| Dianthus carthusianorum | Carthusian Pink |
| Dianthus caryophyllus | Clove Pink |
| Dianthus caryophyllus x plumarius | |
| Dianthus deltoides | Maiden Pink |
| Dianthus gallicus | Jersey Pink |
| Dianthus gratianopolitanus | Cheddar Pink |
| Dianthus gratianopolitanus x caryophyllus | |
| Dianthus gratianopolitanus x caryophyllus x plumarius | |
| Dianthus gratianopolitanus x plumarius | |
| Dianthus guttatus | |
| Dianthus plumarius | Pink |
| Dianthus sylvestris | Wood Pink |
| Diapensia lapponica | Diapensia |
| Dicentra canadensis | Squirrel-corn |
| Dicentra eximia | Turkey-corn |
| Dicentra formosa | Bleeding Heart |
| Dicentra spectrabilis | Bleeding-Heart (Asian) |
| Dichanthium sericeum | |
| Dichanthium sericeum ssp. humile | |
| Dichanthium sericeum ssp. sericeum | |
| Dichelachne crinita | |
| Dichondra micrantha | Kidneyweed |
| Dichrocephala chrysanthemifolia | |
| Dichrocephala integrifolia | |
| Dicksonia antarctica | Australian Tree-fern |
| Didesmus aegyptius | |
| Dieffenbachia seguine | Dumb-cane |
| Diervilla lonicera | |
| Digera muricata | |
| Digitalis ferruginea | Rusty Foxglove |
| Digitalis grandiflora | Yellow Foxglove |
| Digitalis lanata | Grecian Foxglove |
| Digitalis lutea | Straw Foxglove |
| Digitalis purpurea | Foxglove |
| Digitaria aequiglumis | |
| Digitaria ammophila | |
| Digitaria breviglumis | |
| Digitaria brownii | |
| Digitaria ciliaris | Tropical Finger-grass |
| Digitaria cognata | Fall Witch-grass |
| Digitaria ctenantha | |
| Digitaria didactyla | Blue Couch |
| Digitaria diffusa | |
| Digitaria divaricatissima | |
| Digitaria eriantha | Pangola-grass |
| Digitaria hubbardii | |
| Digitaria ischaemum | Smooth Finger-grass |
| Digitaria milanjiana | |
| Digitaria parviflora | |
| Digitaria ramularis | |
| Digitaria sanguinalis | Hairy Finger-grass |
| Digitaria ternata | |
| Digitaria velutina | |
| Digitaria violascens | |
| Dimorphotheca pluvialis | Cape Rain-daisy |
| Dimorphotheca sinuata | Namaqualand Daisy |
| Diphasiastrum alpinum | Alpine Clubmoss |
| Diphasiastrum complanatum | Issler's Clubmoss |
| Diphasiastrum complanatum ssp. issleri | |
| Diplotaxis catholica | |
| Diplotaxis crassifolia | |
| Diplotaxis erucoides | White Rocket |
| Diplotaxis harra | |
| Diplotaxis muralis | Annual Wall-Rocket |
| Diplotaxis tenuifolia | Perennial Wall-Rocket |
| Diplotaxis tenuisiliqua | |
| Diplotaxis viminea | Vineyard Wall-rocket |
| Diplotaxis virgata | |
| Dipsacus fullonum | Wild Teasel |
| Dipsacus fullonum x laciniatus = D. x pseudosilvester | |
| Dipsacus fullonum x sativus | |
| Dipsacus laciniatus | Cut-Leaved Teasel |
| Dipsacus pilosus | Small Teasel |
| Dipsacus sativus | Fuller's Teasel |
| Dipsacus strigosus | Yellow-flowered Teasel |
| Disphyma crassifolium | Purple Dewplant |
| Dissanthelium calycinum | |
| Dittrichia graveolens | Stinking Fleabane |
| Dittrichia viscosa | Woody Fleabane |
| Doronicum austriacum | Austrian Leopard's-bane |
| Doronicum columnae | Eastern Leopard's-bane |
| Doronicum orientale | |
| Doronicum pardalianches | Leopard's-Bane |
| Doronicum pardalianches x plantagineum = D. x willdenowii | Willdenow's Leopard's-bane |
| Doronicum pardalianches x plantagineum x columnae = D. x excelsum | Harpur-Crewe's Leopard's-bane |
| Doronicum plantagineum | Plantain-leaved Leopard's-bane |
| Dorycnium hirsutum | Canary Clover |
| Dorycnium pentaphyllum | Badassi |
| Dorycnium rectum | Greater Badassi |
| Downingia elegans | Californian Lobelia |
| Draba aizoides | Yellow Whitlowgrass |
| Draba incana | Hoary Whitlowgrass |
| Draba muralis | Wall Whitlowgrass |
| Draba norvegica | Rock Whitlowgrass |
| Dracocephalum moldavica | Moldavian Dragon-head |
| Dracocephalum parviflorum | American Dragon-head |
| Dracocephalum thymiflorum | |
| Dracunculus vulgaris | Dragon Arum |
| Drosanthemum attenuatum | |
| Drosanthemum floribundum | Pale Dewplant |
| Drosera anglica | Great Sundew |
| Drosera binata | Forked Sundew |
| Drosera capensis | Cape Sundew |
| Drosera intermedia | Oblong-Leaved Sundew |
| Drosera rotundifolia | Round-Leaved Sundew |
| Drosera rotundifolia x anglica = D. x obovata | |
| Drosera rotundifolia x intermedia = D. x belezeana | |
| Dryas octopetala | Mountain Avens |
| Dryopteris aemula | Hay-scented Buckler-fern |
| Dryopteris affinis | Scaly Male-Fern |
| Dryopteris affinis | |
| Dryopteris borreri | |
| Dryopteris cambrensis | |
| Dryopteris carthusiana | Narrow Buckler-fern |
| Dryopteris carthusiana x dilatata = D. x deweveri | |
| Dryopteris carthusiana x expansa = D. x sarvelae | |
| Dryopteris cristata | Crested Buckler-fern |
| Dryopteris cristata x carthusiana = D. x uliginosa | |
| Dryopteris dilatata | Broad Buckler-Fern |
| Dryopteris dilatata x expansa = D. x ambroseae | |
| Dryopteris expansa | Northern Buckler-fern |
| Dryopteris filix-mas | Male-Fern |
| Dryopteris filix-mas x affinis = D. x complexa | |
| Dryopteris filix-mas x carthusiana = D. x brathaica | |
| Dryopteris oreades | Mountain Male-fern |
| Dryopteris oreades x aemula = D. x pseudoabbreviata | |
| Dryopteris oreades x filix-mas = D. x mantoniae | |
| Dryopteris remota | Scaly Buckler-fern |
| Dryopteris submontana | Rigid Buckler-Fern |
| Dysphania glomulifera | Australian Pigweed |
| Dysphania littoralis | Red Crumbweed |
| Dysphania multifida | Scented Goosefoot |
| Ecballium elaterium | Squirting Cucumber |
| Eccremocarpus scaber | Chilean Glory-flower |
| Echeveria derenbergii | Painted-lady |
| Echinaria capitata | |
| Echinochloa colona | Shama Millet |
| Echinochloa crus-galli | Cockspur |
| Echinochloa crus-pavonis | |
| Echinochloa esculenta | White Millet |
| Echinochloa frumentacea | White Millet |
| Echinochloa muricata | |
| Echinochloa oryzoides | |
| Echinochloa pungens | |
| Echinochloa pyramidalis | |
| Echinochloa turneriana | |
| Echinophora spinosa | |
| Echinopogon ovatus | Hedgehog-grass |
| Echinops bannaticus | Blue Globe-Thistle |
| Echinops exaltatus | Globe-thistle |
| Echinops humilis | |
| Echinops sphaerocephalus | Glandular Globe-thistle |
| Echinops strigosus | Rough-leaved Globe-thistle |
| Echium arenarium | |
| Echium italicum | Pale Bugloss |
| Echium lusitanicum | |
| Echium parviflorum | |
| Echium pininana | Giant Viper's-bugloss |
| Echium pininana x webbii = E. x scilloniensis | |
| Echium plantagineum | Purple Viper's-bugloss |
| Echium rosulatum | Lax Viper's-bugloss |
| Echium tuberculatum | |
| Echium vulgare | Viper's Bugloss |
| Eclipta prostrata | |
| Egeria densa | Large-Flowered Waterweed |
| Ehrharta calycina | |
| Ehrharta erecta | |
| Ehrharta longiflora | |
| Ehrharta longifolia | |
| Ehrharta stipoides | Weeping-grass |
| Eichhornia crassipes | Water Hyacinth |
| Einadia polygonoides | Knotted Goosefoot |
| Einadia trigonos | |
| Einadia trigonos ssp. stellulata | |
| Einadia trigonos ssp. trigonos | Fishweed |
| Elaeagnus commutata | Silver-berry |
| Elaeagnus glabra | |
| Elaeagnus macrophylla | Broad-leaved Oleaster |
| Elaeagnus macrophylla x pungens = E. x submacrophylla | Ebbinge's Oleaster |
| Elaeagnus multiflora | Cherry Elaeagnus |
| Elaeagnus pungens | Spiny Oleaster |
| Elaeagnus umbellata | Spreading Oleaster |
| Elatine hexandra | Six-Stamened Waterwort |
| Elatine hydropiper | Eight-stamened Waterwort |
| Eleocharis acicularis | Needle Spike-rush |
| Eleocharis mamillata | Northern Spike-rush |
| Eleocharis mamillata ssp. austriaca | |
| Eleocharis multicaulis | Many-stalked Spike-rush |
| Eleocharis nodulosa | |
| Eleocharis palustris | Common Spike-rush |
| Eleocharis palustris ssp. palustris | |
| Eleocharis palustris ssp. vulgaris | |
| Eleocharis palustris x uniglumis | |
| Eleocharis parvula | Dwarf Spike-rush |
| Eleocharis quinqueflora | Few-flowered Spike-rush |
| Eleocharis uniglumis | Slender Spike-rush |
| Eleogiton fluitans | Floating Club-rush |
| Eleusine coracana | Finger Millet |
| Eleusine floccifolia | |
| Eleusine indica | Yard-grass |
| Eleusine indica ssp. africana | |
| Eleusine indica ssp. indica | |
| Eleusine multiflora | Fat-spiked Yard-grass |
| Eleusine tristachya | American Yard-grass |
| Eleutherococcus henryi | |
| Elodea callitrichoides | South American Waterweed |
| Elodea canadensis | Canadian Waterweed |
| Elodea nuttallii | Nuttall's Waterweed |
| Elsholtzia ciliata | |
| Elymus antarcticus | |
| Elymus canadensis | |
| Elymus caninus | Bearded Couch |
| Elymus nutans | |
| Elymus scabrus | Australian Couch |
| Elymus sibiricus | |
| Elymus subsecundus | |
| Elymus trachycaulus | |
| Elymus virginicus | |
| Elytrigia atherica | Sea Couch |
| Elytrigia atherica x juncea = E. x acuta | |
| Elytrigia campestris | Neglected Couch |
| Elytrigia campestris ssp. maritima | |
| Elytrigia juncea | Sand Couch |
| Elytrigia juncea ssp. boreoatlantica | |
| Elytrigia repens | Common Couch |
| Elytrigia repens x atherica = E. x drucei | |
| Elytrigia repens x Hordeum secalinum = X Elytrordeum langei | |
| Elytrigia repens x juncea = E. x laxa | |
| Elytrigia x acuta nothossp. obtusiuscula | |
| Emex australis | Double Gee |
| Emex spinosa | |
| Emilia javanica | Tassel-flower |
| Empetrum nigrum | |
| Empetrum nigrum ssp. hermaphroditum | Mountain Crowberry |
| Empetrum nigrum ssp. nigrum | Crowberry |
| Enarthrocarpus lyratus | |
| Enkianthus deflexus | |
| Enneapogon avenaceus | |
| Enneapogon desvauxii | |
| Enneapogon nigricans | |
| Enteropogon acicularis | |
| Epaltes australis | Spreading Nut-heads |
| Epilobium alsinifolium | Chickweed Willowherb |
| Epilobium alsinoides | |
| Epilobium anagallidifolium | Alpine Willowherb |
| Epilobium anagallidifolium x alsinifolium = E. x boissieri | |
| Epilobium brunnescens | New-Zealand Willowherb |
| Epilobium ciliatum | American Willowherb |
| Epilobium ciliatum x brunnescens = E. x brunnatum | |
| Epilobium ciliatum x palustre = E. x fossicola | |
| Epilobium hirsutum | Great Willowherb |
| Epilobium hirsutum x ciliatum = E. x novae-civitatis | |
| Epilobium hirsutum x montanum = E. x erroneum | |
| Epilobium hirsutum x obscurum | |
| Epilobium hirsutum x palustre = E. x waterfallii | |
| Epilobium hirsutum x parviflorum = E. x subhirsutum | |
| Epilobium hirsutum x roseum = E. x goerzii | |
| Epilobium hirsutum x tetragonum = E. x brevipilum | |
| Epilobium komarovianum | Bronzy Willowherb |
| Epilobium lanceolatum | Spear-leaved Willowherb |
| Epilobium lanceolatum x brunnescens = E. x cornubiense | |
| Epilobium lanceolatum x ciliatum | |
| Epilobium lanceolatum x obscurum = E. x lamotteanum | |
| Epilobium lanceolatum x roseum = E. x abortivum | |
| Epilobium lanceolatum x tetragonum = E. x fallacinum | |
| Epilobium montanum | Broad-Leaved Willowherb |
| Epilobium montanum x alsinifolium = E. x facchinii | |
| Epilobium montanum x brunnescens = E. x confusilobum | |
| Epilobium montanum x ciliatum = E. x interjectum | |
| Epilobium montanum x lanceolatum = E. x neogradense | |
| Epilobium montanum x obscurum = E. x aggregatum | |
| Epilobium montanum x palustre = E. x montaniforme | |
| Epilobium montanum x pedunculare = E. x kitcheneri | |
| Epilobium montanum x roseum = E. x mutabile | |
| Epilobium montanum x tetragonum = E. x haussknechtianum | |
| Epilobium obscurum | Short-fruited Willowherb |
| Epilobium obscurum x alsinifolium = E. x rivulicola | |
| Epilobium obscurum x anagallidifolium = E. x marshallianum | |
| Epilobium obscurum x brunnescens = E. x obscurescens | |
| Epilobium obscurum x ciliatum = E. x vicinum | |
| Epilobium obscurum x palustre = E. x schmidtianum | |
| Epilobium obscurum x roseum = E. x brachiatum | |
| Epilobium palustre | Marsh Willowherb |
| Epilobium palustre x alsinifolium = E. x haynaldianum | |
| Epilobium palustre x anagallidifolium = E. x dasycarpum | |
| Epilobium palustre x brunnescens = E. x chateri | |
| Epilobium parviflorum | Hoary Willowherb |
| Epilobium parviflorum x brunnescens = E. x argillaceum | |
| Epilobium parviflorum x ciliatum = E. x floridulum | |
| Epilobium parviflorum x lanceolatum = E. x aschersonianum | |
| Epilobium parviflorum x montanum = E. x limosum | |
| Epilobium parviflorum x montanum x obscurum | |
| Epilobium parviflorum x montanum x roseum | |
| Epilobium parviflorum x obscurum = E. x dacicum | |
| Epilobium parviflorum x palustre = E. x rivulare | |
| Epilobium parviflorum x roseum = E. x persicinum | |
| Epilobium parviflorum x tetragonum = E. x palatinum | |
| Epilobium parviflorum x tetragonum x obscurum | |
| Epilobium pedunculare | Rockery Willowherb |
| Epilobium pictum | |
| Epilobium roseum | Pale Willowherb |
| Epilobium roseum x ciliatum = E. x nutantiflorum | |
| Epilobium roseum x palustre = E. x purpureum | |
| Epilobium tetragonum | Square-stalked Willowherb |
| Epilobium tetragonum x ciliatum = E. x mentiens | |
| Epilobium tetragonum x obscurum = E. x semiobscurum | |
| Epilobium tetragonum x palustre = E. x laschianum | |
| Epilobium tetragonum x roseum = E. x borbasianum | |
| Epimedium alpinum | Barrenwort |
| Epimedium perralderianum | Algerian Barrenwort |
| Epimedium pinnatum | Caucasian Barrenwort |
| Epipactis atrorubens | Dark-Red Helleborine |
| Epipactis atrorubens x helleborine = E. x schmalhausenii | |
| Epipactis dunensis | Dune Helleborine |
| Epipactis helleborine | Broad-Leaved Helleborine |
| Epipactis leptochila | Narrow-Lipped Helleborine |
| Epipactis palustris | Marsh Helleborine |
| Epipactis phyllanthes | Green-flowered Helleborine |
| Epipactis purpurata | Violet Helleborine |
| Epipactis purpurata x helleborine = E. x schulzei | |
| Epipactis sancta | Lindisfarne Helleborine |
| Epipogium aphyllum | Ghost Orchid |
| Equisetum arvense | Field Horsetail |
| Equisetum arvense x palustre = E. x rothmaleri | |
| Equisetum arvense x telmateia = E. x robertsii | |
| Equisetum fluviatile | Water Horsetail |
| Equisetum fluviatile x arvense = E. x litorale | Shore Horsetail |
| Equisetum fluviatile x palustre = E. x dycei | |
| Equisetum fluviatile x telmateia = E. x willmotii | |
| Equisetum hyemale | Rough Horsetail |
| Equisetum hyemale x ramosissimum = E. x moorei | Moore's Horsetail |
| Equisetum hyemale x variegatum = E. x trachyodon | Mackay's Horsetail |
| Equisetum palustre | Marsh Horsetail |
| Equisetum palustre x telmateia = E. x font-queri | |
| Equisetum pratense | Shady Horsetail |
| Equisetum pratense x sylvaticum = E. x mildeanum | |
| Equisetum ramosissimum | Branched Horsetail |
| Equisetum sylvaticum | Wood Horsetail |
| Equisetum sylvaticum x telmateia = E. x bowmanii | |
| Equisetum telmateia | Great Horsetail |
| Equisetum variegatum | Variegated Horsetail |
| Eragrostis aspera | |
| Eragrostis atrovirens | |
| Eragrostis bahiensis | |
| Eragrostis barbinodis | |
| Eragrostis barrelieri | |
| Eragrostis benthamii | |
| Eragrostis bicolor | |
| Eragrostis brownii | |
| Eragrostis caesia | |
| Eragrostis capillaris | |
| Eragrostis chloromelas | |
| Eragrostis cilianensis | Stink-grass |
| Eragrostis curvula | African Love-grass |
| Eragrostis dielsii | |
| Eragrostis echinochloidea | |
| Eragrostis elongata | |
| Eragrostis glandulosipedata | |
| Eragrostis heteromera | |
| Eragrostis kennedyae | |
| Eragrostis kiwuensis | |
| Eragrostis lacunaria | |
| Eragrostis lehmanniana | |
| Eragrostis leptocarpa | |
| Eragrostis leptostachya | |
| Eragrostis lugens | |
| Eragrostis macilenta | |
| Eragrostis microcarpa | |
| Eragrostis minor | Small Love-grass |
| Eragrostis molybdea | |
| Eragrostis neesii | |
| Eragrostis neomexicana | |
| Eragrostis obtusa | |
| Eragrostis parviflora | Weeping Love-grass |
| Eragrostis patentissima | |
| Eragrostis pectinacea | |
| Eragrostis pergracilis | |
| Eragrostis pilosa | Jersey Love-grass |
| Eragrostis plana | |
| Eragrostis planiculmis | |
| Eragrostis procumbens | |
| Eragrostis rotifer | |
| Eragrostis schweinfurthii | |
| Eragrostis tef | Teff |
| Eragrostis tenuifolia | |
| Eragrostis trachycarpa | |
| Eragrostis trichophora | |
| Eragrostis virescens | |
| Eragrostis wilmaniae | |
| Eranthis hyemalis | Winter Aconite |
| Eremopoa persica | |
| Eremopyrum bonaepartis | |
| Eremopyrum orientale | |
| Eremopyrum triticeum | |
| Erepsia heteropetala | Lesser Sea-fig |
| Erica arborea | Tree Heath |
| Erica carnea | Winter Heath |
| Erica ciliaris | Dorset Heath |
| Erica ciliaris x tetralix = E. x watsonii | |
| Erica cinerea | Bell Heather |
| Erica erigena | Irish Heath |
| Erica erigena x carnea = E. x darleyensis | Darley Dale Heath |
| Erica lusitanica | Portuguese Heath |
| Erica mackaiana | Mackay's Heath |
| Erica mackaiana x tetralix = E. x stuartii | |
| Erica terminalis | Corsican Heath |
| Erica tetralix | Cross-Leaved Heath |
| Erica tetralix x vagans = E. x williamsii | |
| Erica vagans | Cornish Heath |
| Erigeron acris | Blue Fleabane |
| Erigeron acris x Conyza canadensis = X Conyzigeron huelsenii | |
| Erigeron annuus | Tall Fleabane |
| Erigeron borealis | Alpine Fleabane |
| Erigeron caucasicus | |
| Erigeron divaricatus | |
| Erigeron glaucus | Seaside Daisy |
| Erigeron karvinskianus | Mexican Fleabane |
| Erigeron philadelphicus | Robin's-plantain |
| Erigeron speciosus | Garden Fleabane |
| Erigeron subtrinervis | |
| Erinus alpinus | Fairy Foxglove |
| Eriobotrya japonica | Loquat |
| Eriocaulon aquaticum | Pipewort |
| Eriochloa contracta | |
| Eriochloa crebra | |
| Eriochloa fatmensis | |
| Eriochloa lemmonii | |
| Eriochloa procera | |
| Eriochloa pseudoacrotricha | Perennial Cup-grass |
| Eriochloa villosa | |
| Eriophorum angustifolium | Common CottonGrass |
| Eriophorum gracile | Slender Cottongrass |
| Eriophorum latifolium | Broad-leaved Cottongrass |
| Eriophorum vaginatum | Hare's-Tail CottonGrass |
| Eritrichium nanum | King-of-the-Alps |
| Erodium acaule | |
| Erodium aureum | |
| Erodium botrys | Mediterranean Stork's-bill |
| Erodium brachycarpum | Hairy-pitted Stork's-bill |
| Erodium chium | Three-lobed Stork's-bill |
| Erodium ciconium | |
| Erodium cicutarium | Common Stork's-bill |
| Erodium cicutarium x lebelii = E. x anaristatum | |
| Erodium corsicum x reichardii = E. x variabile | |
| Erodium crinitum | Eastern Stork's-bill |
| Erodium cygnorum | Western Stork's-bill |
| Erodium cygnorum ssp. cygnorum | |
| Erodium cygnorum ssp. glandulosum | |
| Erodium geoides | |
| Erodium glaucophyllum | |
| Erodium gruinum | Long-beaked Stork's-bill |
| Erodium hymenodes | |
| Erodium laciniatum | |
| Erodium lebelii | Sticky Stork's-bill |
| Erodium malacoides | Soft Stork's-bill |
| Erodium manescavii | Garden Stork's-bill |
| Erodium maritimum | Sea Stork's-bill |
| Erodium moschatum | Musk Stork's-bill |
| Erodium petraeum | Rock Stork's-bill |
| Erodium ruthenicum | |
| Erodium salzmannii | |
| Erodium stephanianum | |
| Erophila glabrescens | Glabrous Whitlowgrass |
| Erophila majuscula | Hairy Whitlowgrass |
| Erophila verna | Common Whitlowgrass |
| Erophila verna agg. | |
| Eruca vesicaria | Garden Rocket |
| Eruca vesicaria ssp. sativa | |
| Eruca vesicaria ssp. vesicaria | Garden Rocket |
| Erucaria hispanica | |
| Erucastrum gallicum | Hairy Rocket |
| Erucastrum griquensis | |
| Erucastrum nasturtiifolium | Watercress-leaved Rocket |
| Erucastrum varium | |
| Eryngium amethystinum | Italian Eryngo |
| Eryngium campestre | Field Eryngo |
| Eryngium giganteum | Tall Eryngo |
| Eryngium giganteum x planum = E. x oliverianum | |
| Eryngium maritimum | Sea-Holly |
| Eryngium planum | Blue Eryngo |
| Eryngium tripartitum | |
| Erysimum asperum | Western Wallflower |
| Erysimum cheiranthoides | Treacle Mustard |
| Erysimum cheiri | Wall-Flower |
| Erysimum decumbens | Decumbent Treacle-mustard |
| Erysimum decumbens x perofskianum = E. x marshallii | Siberian Wallflower |
| Erysimum diffusum | |
| Erysimum grandiflorum | |
| Erysimum helveticum | |
| Erysimum hieraciifolium | |
| Erysimum incanum | Hoary Treacle-mustard |
| Erysimum linifolium | |
| Erysimum repandum | Spreading Treacle-mustard |
| Erysimum scoparium | |
| Erythronium dens-canis | Dog's-Tooth-Violet |
| Escallonia macrantha | Escallonia |
| Eschscholzia caespitosa | |
| Eschscholzia californica | Californian Poppy |
| Eucalyptus coccifera | Tasmanian Snow-gum |
| Eucalyptus dalrympleana | Broad-leaved Kindlingbark |
| Eucalyptus globulus | Southern Blue-gum |
| Eucalyptus gunnii | Cider Gum |
| Eucalyptus johnstonii | Johnston's Gum |
| Eucalyptus niphophila | Shrubby Snow-gum |
| Eucalyptus parvifolia | Small-leaved Gum |
| Eucalyptus pulchella | White Peppermint-gum |
| Eucalyptus urnigera | Urn-fruited Gum |
| Eucalyptus viminalis | Ribbon Gum |
| Euclidium syriacum | |
| Euonymus europaeus | Spindle |
| Euonymus fortunei | |
| Euonymus hamiltonianus | Himalayan Spindle |
| Euonymus japonicus | Evergreen Spindle |
| Euonymus latifolius | Large-leaved Spindle |
| Euonymus planipes | |
| Eupatorium cannabinum | Hemp-agrimony |
| Euphorbia amygdaloides | Wood Spurge |
| Euphorbia amygdaloides ssp. amygdaloides | |
| Euphorbia amygdaloides ssp. robbiae | |
| Euphorbia arguta | |
| Euphorbia ceratocarpa | Horned Spurge |
| Euphorbia characias | Mediterranean Spurge |
| Euphorbia characias ssp. characias | |
| Euphorbia characias ssp. veneta | |
| Euphorbia corallioides | Coral Spurge |
| Euphorbia cuneifolia | |
| Euphorbia cyparissias | Cypress Spurge |
| Euphorbia cyparissias x waldsteinii = E. x gayeri | Gáyer's Spurge |
| Euphorbia dulcis | Sweet Spurge |
| Euphorbia esula | Leafy Spurge |
| Euphorbia esula agg. | |
| Euphorbia esula x cyparissias = E. x pseudoesula | |
| Euphorbia esula x waldsteinii = E. x pseudovirgata | Twiggy Spurge |
| Euphorbia exigua | Dwarf Spurge |
| Euphorbia falcata | Sickle Spurge |
| Euphorbia griffithii | Griffith's Spurge |
| Euphorbia helioscopia | Sun Spurge |
| Euphorbia hirta | Asthma-plant |
| Euphorbia hyberna | Irish Spurge |
| Euphorbia lathyris | Caper Spurge |
| Euphorbia maculata | Spotted Spurge |
| Euphorbia mellifera | Canary Spurge |
| Euphorbia myrsinites | Broad-leaved Glaucous-spurge |
| Euphorbia oblongata | Balkan Spurge |
| Euphorbia paralias | Sea Spurge |
| Euphorbia peplis | Purple Spurge |
| Euphorbia peplus | Petty Spurge |
| Euphorbia platyphyllos | Broad-Leaved Spurge |
| Euphorbia portlandica | Portland Spurge |
| Euphorbia portlandica x paralias | |
| Euphorbia segetalis | Corn Spurge |
| Euphorbia serpens | |
| Euphorbia spinosa | |
| Euphorbia stricta | Upright Spurge |
| Euphorbia taurinensis | |
| Euphorbia valerianifolia | |
| Euphorbia villosa | Hairy Spurge |
| Euphorbia waldsteinii | Waldstein's Spurge |
| Euphrasia anglica x arctica | |
| Euphrasia anglica x confusa | |
| Euphrasia anglica x micrantha | |
| Euphrasia anglica x nemorosa | |
| Euphrasia anglica x vigursii | |
| Euphrasia arctica | |
| Euphrasia arctica ssp. arctica | |
| Euphrasia arctica ssp. borealis | |
| Euphrasia arctica x confusa | |
| Euphrasia arctica x foulaensis | |
| Euphrasia arctica x heslop-harrisonii | |
| Euphrasia arctica x marshallii | |
| Euphrasia arctica x micrantha = E. x difformis | |
| Euphrasia arctica x nemorosa | |
| Euphrasia arctica x nemorosa x confusa | |
| Euphrasia arctica x nemorosa x micrantha | |
| Euphrasia arctica x ostenfeldii | |
| Euphrasia arctica x rotundifolia | |
| Euphrasia arctica x salisburgensis | |
| Euphrasia arctica x scottica = E. x venusta | |
| Euphrasia arctica x tetraquetra | |
| Euphrasia cambrica | |
| Euphrasia cambrica x ostenfeldii | |
| Euphrasia campbelliae | |
| Euphrasia campbelliae x micrantha | |
| Euphrasia confusa | |
| Euphrasia confusa x cambrica | |
| Euphrasia confusa x campbelliae | |
| Euphrasia confusa x foulaensis | |
| Euphrasia confusa x frigida | |
| Euphrasia confusa x frigida x scottica | |
| Euphrasia confusa x heslop-harrisonii | |
| Euphrasia confusa x micrantha | |
| Euphrasia confusa x ostenfeldii | |
| Euphrasia confusa x scottica | |
| Euphrasia foulaensis | |
| Euphrasia foulaensis x marshallii | |
| Euphrasia foulaensis x micrantha | |
| Euphrasia foulaensis x ostenfeldii | |
| Euphrasia foulaensis x rotundifolia | |
| Euphrasia foulaensis x scottica | |
| Euphrasia frigida | |
| Euphrasia frigida x micrantha | |
| Euphrasia frigida x scottica | |
| Euphrasia heslop-harrisonii | |
| Euphrasia marshallii | |
| Euphrasia marshallii x campbelliae | |
| Euphrasia marshallii x micrantha | |
| Euphrasia marshallii x scottica | |
| Euphrasia micrantha | |
| Euphrasia micrantha x salisburgensis | |
| Euphrasia micrantha x scottica = E. x electa | |
| Euphrasia nemorosa | |
| Euphrasia nemorosa x campbelliae | |
| Euphrasia nemorosa x confusa | |
| Euphrasia nemorosa x foulaensis | |
| Euphrasia nemorosa x marshallii | |
| Euphrasia nemorosa x micrantha | |
| Euphrasia nemorosa x ostenfeldii | |
| Euphrasia nemorosa x pseudokerneri | |
| Euphrasia nemorosa x salisburgensis | |
| Euphrasia nemorosa x scottica | |
| Euphrasia nemorosa x stricta = E. x haussknechtii | |
| Euphrasia officinalis agg. | |
| Euphrasia officinalis ssp. anglica | |
| Euphrasia ostenfeldii | |
| Euphrasia ostenfeldii agg. | |
| Euphrasia ostenfeldii x micrantha | |
| Euphrasia ostenfeldii x scottica | |
| Euphrasia pseudokerneri | |
| Euphrasia pseudokerneri x confusa | |
| Euphrasia rivularis | |
| Euphrasia rostkoviana | |
| Euphrasia rostkoviana ssp. montana | |
| Euphrasia rostkoviana ssp. rostkoviana | |
| Euphrasia rostkoviana x anglica | |
| Euphrasia rostkoviana x arctica | |
| Euphrasia rostkoviana x confusa | |
| Euphrasia rostkoviana x micrantha | |
| Euphrasia rostkoviana x nemorosa | |
| Euphrasia rostkoviana x rivularis | |
| Euphrasia rotundifolia | |
| Euphrasia salisburgensis | |
| Euphrasia scottica | |
| Euphrasia stricta | |
| Euphrasia tetraquetra | |
| Euphrasia tetraquetra x confusa | |
| Euphrasia tetraquetra x marshallii | |
| Euphrasia tetraquetra x micrantha | |
| Euphrasia tetraquetra x nemorosa | |
| Euphrasia tetraquetra x pseudokerneri | |
| Euphrasia tetraquetra x stricta | |
| Euphrasia vigursii | |
| Euphrasia vigursii x tetraquetra | |
| Exaculum pusillum | Guernsey Centaury |
| Exodeconus glutinosa | |
| Facelis retusa | |
| Fagopyrum dibotrys | Tall Buckwheat |
| Fagopyrum esculentum | Buckwheat |
| Fagopyrum tataricum | Green Buckwheat |
| Fagus sylvatica | Beech |
| Falcaria vulgaris | Longleaf |
| Fallopia baldschuanica | Russian Vine |
| Fallopia convolvulus | Black Bindweed |
| Fallopia dumetorum | Copse Bindweed |
| Fallopia japonica | Japanese Knotweed |
| Fallopia japonica x baldschuanica = F. x conollyana | |
| Fallopia japonica x sachalinensis = F. x bohemica | |
| Fallopia sachalinensis | Giant Knotweed |
| Fargesia murielae | Umbrella Bamboo |
| Fargesia spathacea | Chinese Fountain-bamboo |
| Fascicularia bicolor | Rhodostachys |
| Fatsia japonica | Fatsia |
| Fedia cornucopiae | Horn-of-plenty |
| Felicia abyssinica | |
| Felicia amelloides | Blue Marguerite |
| Felicia amoena | |
| Felicia angustifolia | |
| Felicia bergeriana | Kingfisher Daisy |
| Felicia heterophylla | |
| Felicia tenella | |
| Ferula communis | Giant Fennel |
| Festuca altissima | Wood Fescue |
| Festuca arenaria | Rush-leaved Fescue |
| Festuca arenaria ssp. arenaria | |
| Festuca arenaria ssp. oraria | |
| Festuca arenaria x Vulpia fasciculata = X Festulpia melderisii | |
| Festuca armoricana | Breton Fescue |
| Festuca arundinacea x gigantea = F. x fleischeri | |
| Festuca arundinacea x Lolium multiflorum | |
| Festuca arundinacea x Lolium perenne = X Festulolium holmbergii | |
| Festuca brevipila | Hard Fescue |
| Festuca buchtienii | |
| Festuca caprina | |
| Festuca filiformis | Fine-leaved Sheep's-fescue |
| Festuca gautieri | Spiky Fescue |
| Festuca gautieri ssp. scoparia | |
| Festuca heterophylla | Various-leaved Fescue |
| Festuca huonii | Huon's Fescue |
| Festuca lemanii | Confused Fescue |
| Festuca longifolia | Blue Fescue |
| Festuca ovina | Sheep's-fescue |
| Festuca ovina agg. | |
| Festuca ovina ssp. hirtula | |
| Festuca ovina ssp. ophioliticola | |
| Festuca ovina ssp. ovina | |
| Festuca rubra | Red Fescue |
| Festuca rubra ssp. arctica | |
| Festuca rubra ssp. commutata | Chewing's Fescue |
| Festuca rubra ssp. juncea | |
| Festuca rubra ssp. litoralis | |
| Festuca rubra ssp. megastachys | |
| Festuca rubra ssp. rubra | |
| Festuca rubra ssp. scotica | |
| Festuca rubra x Vulpia bromoides | |
| Festuca rubra x Vulpia fasciculata = X Festulpia hubbardii | |
| Festuca rubra x Vulpia myuros | |
| Festuca rupicola | |
| Festuca trachylepis | |
| Festuca vivipara | Viviparous Sheep's-fescue |
| Ficaria verna | Lesser Celandine |
| Ficaria verna ssp. verna | |
| Ficaria verna ssp. chrysocephala | |
| Ranunculus verna ssp. fertilis | |
| Ficaria verna ssp. ficariiformis | |
| Ficus carica | Fig |
| Ficus pumila | Creeping Fig |
| Filago arvensis | Field Cudweed |
| Filago duriaei | |
| Filago gallica | Narrow-leaved Cudweed |
| Filago lutescens | Red-Tipped Cudweed |
| Filago minima | Small Cudweed |
| Filago pyramidata | Broad-Leaved Cudweed |
| Filago vulgaris | Common Cudweed |
| Filipendula camtschatica | Giant Meadowsweet |
| Filipendula rubra | Queen-of-the-prairie |
| Filipendula ulmaria | Meadowsweet |
| Filipendula vestita | |
| Filipendula vulgaris | Dropwort |
| Filipendula x purpurea | Red Meadowsweet |
| Flaveria bidentis | Speedy-weed |
| Foeniculum vulgare | Fennel |
| Foeniculum vulgare ssp. piperitum | Bitter Fennel |
| Foeniculum vulgare ssp. vulgare | |
| Forsythia giraldiana | Early Forsythia |
| Forsythia ovata | Korean Forsythia |
| Forsythia suspensa | Golden-bell |
| Forsythia suspensa x viridissima = F. x intermedia | Forsythia |
| Fragaria ananassa | Garden Strawberry |
| Fragaria chiloensis | Beach Strawberry |
| Fragaria moschata | Hautbois Strawberry |
| Fragaria vesca | Wild Strawberry |
| Frangula alnus | Alder Buckthorn |
| Frankenia laevis | Sea Heath |
| Frankenia pulverulenta | |
| Fraxinus americana | White Ash |
| Fraxinus excelsior | Ash |
| Fraxinus latifolia | Oregon Ash |
| Fraxinus ornus | Manna Ash |
| Fraxinus pennsylvanica | Red Ash |
| Freesia x hybrida | Freesia |
| Fritillaria meleagris | Fritillary |
| Fritillaria pyrenaica | Pyrenean Snake's-head |
| Fuchsia cordifolia x globosa = F. 'Corallina' | Large-flowered Fuchsia |
| Fuchsia excortica | Tree Fuchsia |
| Fuchsia magellanica | Fuchsia |
| Fuchsia x hybrida | |
| Fumaria agraria | |
| Fumaria bastardii | Tall Ramping-fumitory |
| Fumaria bastardii x muralis | |
| Fumaria capreolata | White Ramping-Fumitory |
| Fumaria capreolata ssp. babingtonii | |
| Fumaria capreolata ssp. capreolata | |
| Fumaria densiflora | Dense-flowered Fumitory |
| Fumaria muralis | Common Ramping-Fumitory |
| Fumaria muralis ssp. boroei | |
| Fumaria muralis ssp. muralis | |
| Fumaria muralis ssp. neglecta | |
| Fumaria muralis x officinalis = F. x painteri | |
| Fumaria occidentalis | Western Ramping-Fumitory |
| Fumaria officinalis | Common Fumitory |
| Fumaria officinalis ssp. officinalis | |
| Fumaria officinalis ssp. wirtgenii | |
| Fumaria officinalis x densiflora | |
| Fumaria officinalis x parviflora | |
| Fumaria parviflora | Fine-leaved Fumitory |
| Fumaria purpurea | Purple Ramping-Fumitory |
| Fumaria reuteri | Martin's Ramping-Fumitory |
| Fumaria vaillantii | Few-flowered Fumitory |
| Furcraea bedinghausii | |
| Gagea bohemica | Early Star-of-Bethlehem |
| Gagea lutea | Yellow Star-of-Bethlehem |
| Gaillardia aristata | Blanketflower |
| Gaillardia aristata x pulchella = G. x grandiflora | Blanketflower |
| Galactites tomentosus | |
| Galanthus allenii | |
| Galanthus elwesii | Greater Snowdrop |
| Galanthus elwesii x plicatus | |
| Galanthus nivalis | Snowdrop |
| Galanthus nivalis x elwesii | |
| Galanthus nivalis x plicatus | |
| Galanthus plicatus | Pleated Snowdrop |
| Galanthus plicatus ssp. byzantinus | |
| Galanthus plicatus ssp. plicatus | |
| Galanthus reginae-olgae | Queen Olga's Snowdrop |
| Galanthus woronowii | Green Snowdrop |
| Galega officinalis | Goat's-Rue |
| Galenia africana | |
| Galeopsis angustifolia | Red Hemp-Nettle |
| Galeopsis bifida | Bifid Hemp-Nettle |
| Galeopsis ladanum | Broad-leaved Hemp-nettle |
| Galeopsis segetum | Downy Hemp-nettle |
| Galeopsis speciosa | Large-Flowered Hemp-Nettle |
| Galeopsis tetrahit | Common Hemp-Nettle |
| Galeopsis tetrahit x bifida = G. x ludwigii | |
| Galinsoga parviflora | Gallant Soldier |
| Galinsoga quadriradiata | Shaggy Soldier |
| Galium album | Hedge Bedstraw |
| Galium album ssp. erectum | |
| Galium album ssp. mollugo | |
| Galium aparine | Cleavers |
| Galium aristatum | |
| Galium boreale | Northern Bedstraw |
| Galium constrictum | Slender Marsh-bedstraw |
| Galium divaricatum | |
| Galium glaucum | |
| Galium murale | Small Goosegrass |
| Galium odoratum | Woodruff |
| Galium palustre | Marsh Bedstraw |
| Galium palustre ssp. elongatum | Great Marsh-bedstraw |
| Galium palustre ssp. palustre | Common Marsh-bedstraw |
| Galium parisiense | Wall Bedstraw |
| Galium pumilum | Slender Bedstraw |
| Galium saxatile | Heath Bedstraw |
| Galium setaceum | |
| Galium spurium | False Cleavers |
| Galium sterneri | Limestone Bedstraw |
| Galium sterneri x saxatile | |
| Galium tenuissimum | |
| Galium tricornutum | Corn Cleavers |
| Galium uliginosum | Fen Bedstraw |
| Galium verrucosum | |
| Galium verum | Lady's Bedstraw |
| Galium verum x mollugo = G. x pomeranicum | |
| Galium virgatum | |
| Garrya elliptica | Silk-tassel |
| Garrya laurifolia | Large-leaved Silk-tassel |
| Gastridium phleoides | Eastern Nit-grass |
| Gastridium ventricosum | Nit-grass |
| Gaudinia fragilis | French Oat-grass |
| Gaultheria mucronata | Prickly Heath |
| Gaultheria procumbens | Checkerberry |
| Gaultheria shallon | Shallon |
| Gaultheria shallon x mucronata = G. x wisleyensis | |
| Gaura coccinea | Scarlet Gaura |
| Gazania rigens | Treasureflower |
| Genista aetnensis | Mount Etna Broom |
| Genista anglica | Petty Whin |
| Genista florida | |
| Genista hispanica | Spanish Gorse |
| Genista hispanica ssp. occidentalis | |
| Genista linifolia | Needle-leaved Broom |
| Genista monspessulana | Montpellier Broom |
| Genista pilosa | Hairy Greenweed |
| Genista radiata | Southern Greenweed |
| Genista sagittalis | Winged Greenweed |
| Genista tenera | Madeira Broom |
| Genista tinctoria | Dyer's Greenweed |
| Genista tinctoria ssp. littoralis | |
| Genista tinctoria ssp. tinctoria | |
| Gentiana asclepiadea | Willow Gentian |
| Gentiana clusii | Trumpet Gentian |
| Gentiana cruciata | Cross Gentian |
| Gentiana lagodechiana | |
| Gentiana nivalis | Alpine Gentian |
| Gentiana pneumonanthe | Marsh Gentian |
| Gentiana verna | Spring Gentian |
| Gentianella amarella | Autumn Gentian |
| Gentianella amarella ssp. amarella | |
| Gentianella amarella ssp. hibernica | |
| Gentianella amarella ssp. septentrionalis | |
| Gentianella amarella x anglica = G. x davidiana | |
| Gentianella amarella x uliginosa | |
| Gentianella anglica | Early Gentian |
| Gentianella campestris | Field Gentian |
| Gentianella ciliata | Fringed Gentian |
| Gentianella germanica | Chiltern Gentian |
| Gentianella germanica x amarella = G. x pamplinii | |
| Gentianella uliginosa | Dune Gentian |
| Geranium bohemicum | |
| Geranium brutium | |
| Geranium carolinianum | Carolina Crane's-bill |
| Geranium collinum | |
| Geranium columbinum | Long-Stalked Crane's-bill |
| Geranium dissectum | Cut-Leaved Crane's-bill |
| Geranium divaricatum | Spreading Crane's-bill |
| Geranium endressii | French Crane's-bill |
| Geranium endressii x versicolor = G. x oxonianum | Druce's Crane's-bill |
| Geranium eriostemon | |
| Geranium herrerae | Alderney Crane's-bill |
| Geranium himalayense | Himalayan Crane's-bill |
| Geranium ibericum | Caucasian Crane's-bill |
| Geranium ibericum x platypetalum = G. x magnificum | Purple Crane's-bill |
| Geranium lucidum | Shining Crane's-bill |
| Geranium macrorrhizum | Rock Crane's-bill |
| Geranium maderense | Giant Herb-Robert |
| Geranium molle | Dove's-foot Crane's-bill |
| Geranium nodosum | Knotted Crane's-bill |
| Geranium phaeum | Dusky Crane's-bill |
| Geranium phaeum x reflexum = G. x monacense | Munich Crane's-bill |
| Geranium platypetalum | Glandular Crane's-bill |
| Geranium potentilloides | |
| Geranium pratense | Meadow Crane's-bill |
| Geranium psilostemon | Armenian Crane's-bill |
| Geranium purpureum | Little Robin |
| Geranium pusillum | Small-Flowered Crane's-sbill |
| Geranium pyrenaicum | Hedgerow Crane's-bill |
| Geranium reflexum | Reflexed Crane's-bill |
| Geranium reuteri | |
| Geranium robertianum | Herb-Robert |
| Geranium robertianum x purpureum | |
| Geranium rotundifolium | Round-Leaved Crane's-bill |
| Geranium rubescens | Greater Herb-Robert |
| Geranium sanguineum | Bloody Crane's-bill |
| Geranium sibiricum | |
| Geranium subulatostipulatum | |
| Geranium sylvaticum | Wood Crane's-bill |
| Geranium tuberosum | |
| Geranium versicolor | Pencilled Crane's-bill |
| Geum aleppicum | |
| Geum macrophyllum | Large-Leaved Avens |
| Geum quellyon | Scarlet Avens |
| Geum rivale | Water Avens |
| Geum rivale x urbanum = G. x intermedium | Hybrid Avens |
| Geum urbanum | Wood Avens |
| Gilia achilleifolia | |
| Gilia capitata | Blue-thimble-flower |
| Gilia inconspicua | |
| Gilia laciniata | |
| Gilia tricolor | Bird's-eyes |
| Ginkgo biloba | Maidenhair-tree |
| Girardinia diversifolia | Nilghiri Nettle |
| Gladiolus cardinalis x tristis = G. x colvillei | |
| Gladiolus communis | Eastern Gladiolus |
| Gladiolus communis ssp. byzantinus | |
| Gladiolus communis ssp. communis | |
| Gladiolus illyricus | Wild Gladiolus |
| Gladiolus x hortulanus | Large-flowered Gladiolus |
| Glaucium corniculatum | Red Horned-poppy |
| Glaucium flavum | Yellow Horned-Poppy |
| Glaucium grandiflorum | |
| Glaux maritima | Sea Milkwort |
| Glebionis coronaria | Crown Daisy |
| Glebionis segetum | Corn Marigold |
| Glechoma hederacea | Ground-Ivy |
| Glyceria declinata | Small Sweet-grass |
| Glyceria fluitans | Floating Sweet-grass |
| Glyceria fluitans x declinata | |
| Glyceria fluitans x notata = G. x pedicellata | Hybrid Sweet-grass |
| Glyceria maxima | Reed Sweet-Grass |
| Glyceria multiflora | |
| Glyceria notata | Plicate Sweet-grass |
| Glyceria spicata | |
| Glycine max | Soya-bean |
| Glycyrrhiza echinata | German Liquorice |
| Glycyrrhiza glabra | Liquorice |
| Glycyrrhiza lepidota | American Liquorice |
| Gnaphalium albescens | |
| Gnaphalium japonicum | Japanese Cudweed |
| Gnaphalium luteoalbum | Jersey Cudweed |
| Gnaphalium norvegicum | Highland Cudweed |
| Gnaphalium purpureum | American Cudweed |
| Gnaphalium supinum | Dwarf Cudweed |
| Gnaphalium sylvaticum | Heath Cudweed |
| Gnaphalium uliginosum | Marsh Cudweed |
| Gnaphalium undulatum | Cape Cudweed |
| Gnaphalium verticillatum | |
| Gnaphalium viscosum | Sticky Cudweed |
| Goldbachia laevigata | |
| Goodyera repens | Creeping Lady's-Tresses |
| Gossypium herbaceum | Levant Cotton |
| Gossypium hirsutum | Upland Cotton |
| Gratiola officinalis | Gratiole |
| Grindelia chiloensis | Shrubby Gumweed |
| Grindelia decumbens | |
| Grindelia robusta | Californian Gumweed |
| Grindelia squarrosa | Curly-cup Gumweed |
| Grindelia stricta | Coastal Gumplant |
| Griselinia littoralis | New-Zealand Broadleaf |
| Groenlandia densa | Opposite-leaved Pondweed |
| Guizotia abyssinica | Niger |
| Gunnera manicata | Brazilian Giant-Rhubarb |
| Gunnera peltata | |
| Gunnera tinctoria | Giant-Rhubarb |
| Gymnadenia conopsea | Chalk Fragrant-Orchid |
| Gymnadenia conopsea ssp. borealis | |
| Gymnadenia densiflora | |
| Gymnadenia conopsea x Coeloglossum viride = X Gymnaglossum jacksonii | |
| Gymnadenia conopsea x Dactylorhiza fuchsii = X Dactylodenia st-quintinii | |
| Gymnadenia conopsea x Dactylorhiza incarnata = X Dactylodenia vollmannii | |
| Gymnadenia conopsea x Dactylorhiza maculata = X Dactylodenia legrandiana | |
| Gymnadenia conopsea x Dactylorhiza praetermissa = X Dactylodenia wintoni | |
| Gymnadenia conopsea x Dactylorhiza purpurella = X Dactylodenia varia | |
| Gymnocarpium dryopteris | Oak Fern |
| Gymnocarpium robertianum | Limestone Fern |
| Gypsophila acutifolia | |
| Gypsophila elegans | Annual Baby's-breath |
| Gypsophila muralis | Annual Gypsophila |
| Gypsophila paniculata | Baby's-breath |
| Gypsophila pilosa | |
| Gypsophila repens | Alpine Gypsophila |
| Gypsophila scorzonerifolia | |
| Gypsophila viscosa | |
| Hackelia floribunda | Large-flowered Stickseed |
| Hacquetia epipactis | Hacquetia |
| Hainardia cylindrica | One-glumed Hard-grass |
| Haloragis micrantha | Creeping Raspwort |
| Hammarbya paludosa | Bog Orchid |
| Haplophyllum tuberculatum | |
| Harpachne schimperi | |
| Hebe 'Autumn Glory' | |
| Hebenstretia dentata | |
| Hedera algeriensis | Algerian Ivy |
| Hedera colchica | Persian Ivy |
| Hedera helix | Common Ivy |
| Hedera helix ssp. canariensis | Canary Ivy |
| Hedera helix ssp. poetarum | Yellow-berried Ivy |
| Hedera hibernica | Atlantic Ivy |
| Hedypnois cretica | Scaly Hawkbit |
| Hedysarum coronarium | Italian Sainfoin |
| Hedysarum glomeratum | |
| Hedysarum spinosissimum | |
| Helenium autumnale | Sneezeweed |
| Helenium quadridentatum | |
| Helianthemum apenninum | White Rock-Rose |
| Helianthemum nummularium | Common Rock-Rose |
| Helianthemum nummularium x apenninum = H. x sulphureum | |
| Helianthemum oelandicum | Hoary Rock-Rose |
| Helianthemum oelandicum ssp. incanum | |
| Helianthemum oelandicum ssp. levigatum | |
| Helianthemum oelandicum ssp. piloselloides | |
| Helianthemum pilosum | |
| Helianthus angustifolius | Swamp Sunflower |
| Helianthus annuus | Sunflower |
| Helianthus annuus x decapetalus = H. x multiflorus | Thin-leaved Sunflower |
| Helianthus argophyllus | Silver-leaf Sunflower |
| Helianthus bolanderi | Bolander's Sunflower |
| Helianthus debilis | |
| Helianthus decapetalus | Thin-leaved Sunflower |
| Helianthus divaricatus | Rough Sunflower |
| Helianthus hirsutus | Bristly Sunflower |
| Helianthus maximilianii | Maximilian's Sunflower |
| Helianthus petiolaris | Lesser Sunflower |
| Helianthus strumosus | Pale-leaved Sunflower |
| Helianthus tuberosus | Jerusalem Artichoke |
| Helianthus tuberosus x pauciflorus = H. x laetiflorus | Perennial Sunflower |
| Helichrysum apiculatum | Yellow-buttons |
| Helichrysum bellidioides | New-Zealand Everlastingflower |
| Helichrysum bracteatum | Strawflower |
| Helichrysum capillaceum | |
| Helichrysum expansum | |
| Helichrysum italicum | Curry-plant |
| Helichrysum odoratissimum | |
| Helichrysum petiolare | Silver-bush Everlastingflower |
| Helichrysum stoechas | |
| Helictotrichon bromoides | |
| Helictotrichon neesii | Swamp Wallaby-grass |
| Helictotrichon recurvatum | |
| Helictotrichon turgidulum | |
| Heliopsis helianthoides | Rough Oxeye |
| Heliotropium amplexicaule | Summer Heliotrope |
| Heliotropium arborescens | Cherry-pie |
| Heliotropium curassavicum | Seaside Heliotrope |
| Heliotropium europaeum | European Turn-sole |
| Helleborus argutifolius | Corsican Hellebore |
| Helleborus dumetorum | |
| Helleborus foetidus | Stinking Hellebore |
| Helleborus orientalis | Lenten-Rose |
| Helleborus viridis | Green Hellebore |
| Helleborus viridis ssp. occidentalis | |
| Helleborus x hybridus | Hybrid Lenten-rose |
| Helminthotheca echioides | Bristly Oxtongue |
| Hemerocallis citrina | Citron Day-lily |
| Hemerocallis fulva | Orange Day-Lily |
| Hemerocallis lilioasphodelus | Yellow Day-lily |
| Hemizonia fasciculata | Fascicled Spikeweed |
| Hemizonia fitchii | Fitch's Spikeweed |
| Hemizonia kelloggii | Kellogg's Spikeweed |
| Hemizonia pungens | Common Spikeweed |
| Hemizonia ramosissima | Slender Spikeweed |
| Hepatica nobilis | Liverleaf |
| Heracleum canescens | |
| Heracleum mantegazzianum | Giant Hogweed |
| Heracleum sphondylium | Hogweed |
| Heracleum sphondylium ssp. flavescens | |
| Heracleum sphondylium ssp. sphondylium | |
| Heracleum sphondylium x mantegazzianum | |
| Herminium monorchis | Musk Orchid |
| Hermodactylus tuberosus | Snake's-head Iris |
| Herniaria ciliolata | Fringed Rupturewort |
| Herniaria ciliolata ssp. ciliolata | |
| Herniaria ciliolata ssp. subciliata | |
| Herniaria glabra | Smooth Rupturewort |
| Herniaria hirsuta | Hairy Rupturewort |
| Hesperis laciniata | |
| Hesperis matronalis | Dame's-Violet |
| Heterorhachis aculeata | |
| Heterotheca subaxillaris | Camphorweed |
| Heuchera sanguinea | Coralbells |
| Heuchera x brizoides | |
| Heuchera x brizoides x Tiarella cordifolia = x Heucherella tiarelloides | |
| Hibiscus syriacus | Syrian Ketmia |
| Hibiscus trionum | Bladder Ketmia |
| Hieracium acamptum | |
| Hieracium acuminatum | |
| Hieracium aggregatum | |
| Hieracium alpinum | |
| Hieracium amplexicaule | |
| Hieracium ampliatum | |
| Hieracium anfractiforme | |
| Hieracium anglicum | |
| Hieracium anguinum | |
| Hieracium angustatiforme | |
| Hieracium angustatum | |
| Hieracium angustisquamum | |
| Hieracium argenteum | |
| Hieracium asteridiophyllum | |
| Hieracium attenuatifolium | |
| Hieracium auratiflorum | |
| Hieracium australius | |
| Hieracium backhousei | |
| Hieracium bakerianum | |
| Hieracium basalticola | |
| Hieracium borreri | |
| Hieracium breadalbanense | |
| Hieracium breve | |
| Hieracium brigantum | |
| Hieracium britanniciforme | |
| Hieracium britannicum | |
| Hieracium cacuminum | |
| Hieracium caesiomurorum | |
| Hieracium caesionigrescens | |
| Hieracium calcaricola | |
| Hieracium caledonicum | |
| Hieracium calenduliflorum | |
| Hieracium callistophyllum | |
| Hieracium calvum | |
| Hieracium cambricogothicum | |
| Hieracium cambricum | |
| Hieracium camptopetalum | |
| Hieracium candelabrae | |
| Hieracium cantianum | |
| Hieracium cardiophyllum | |
| Hieracium carneddorum | |
| Hieracium carpathicum | |
| Hieracium centripetale | |
| Hieracium cheriense | |
| Hieracium chloranthum | |
| Hieracium chondrillifolium | |
| Hieracium chrysolorum | |
| Hieracium cillense | |
| Hieracium cinderella | |
| Hieracium clovense | |
| Hieracium completum | |
| Hieracium cravoniense | |
| Hieracium crebridentiforme | |
| Hieracium cremnanthes | |
| Hieracium cumbriense | |
| Hieracium cuneifrons | |
| Hieracium cuspidens | |
| Hieracium cyathis | |
| Hieracium cymbifolium | |
| Hieracium dasythrix | |
| Hieracium decolor | |
| Hieracium dewarii | |
| Hieracium diaphanoides | |
| Hieracium diaphanum | |
| Hieracium dicella | |
| Hieracium difficile | |
| Hieracium dilectum | |
| Hieracium dipteroides | |
| Hieracium discophyllum | |
| Hieracium dissimile | |
| Hieracium diversidens | |
| Hieracium dovrense | |
| Hieracium drummondii | |
| Hieracium duriceps | |
| Hieracium eboracense | |
| Hieracium ebudicum | |
| Hieracium eucallum | |
| Hieracium eustales | |
| Hieracium eustomon | |
| Hieracium eximium | |
| Hieracium exotericum | |
| Hieracium flocculosum | |
| Hieracium fratrum | |
| Hieracium fulvocaesium | |
| Hieracium glanduliceps | |
| Hieracium glandulidens | |
| Hieracium globosiflorum | |
| Hieracium gothicoides | |
| Hieracium gougetianum | |
| Hieracium gracilifolium | |
| Hieracium grandidens | |
| Hieracium graniticola | |
| Hieracium gratum | |
| Hieracium grovesii | |
| Hieracium hanburyi | |
| Hieracium hartii | |
| Hieracium hastiforme | |
| Hieracium hebridense | |
| Hieracium hethlandiae | |
| Hieracium hibernicum | |
| Hieracium hjeltii | |
| Hieracium holophyllum | |
| Hieracium holosericeum | |
| Hieracium hyparcticoides | |
| Hieracium hypochaeroides | |
| Hieracium insigne | |
| Hieracium insulare | |
| Hieracium integratum | |
| Hieracium iricum | |
| Hieracium isabellae | |
| Hieracium itunense | |
| Hieracium jovimontis | |
| Hieracium kennethii | |
| Hieracium kentii | |
| Hieracium laetificum | |
| Hieracium lanatum | |
| Hieracium langwellense | |
| Hieracium larigense | |
| Hieracium lasiophyllum | |
| Hieracium latobrigorum | |
| Hieracium lepidulum | |
| Hieracium leptodon | |
| Hieracium leyanum | |
| Hieracium leyi | |
| Hieracium linguans | |
| Hieracium lingulatum | |
| Hieracium lissolepium | |
| Hieracium longilobum | |
| Hieracium macrocarpum | |
| Hieracium maculatum | |
| Hieracium maculoides | |
| Hieracium maculosum | |
| Hieracium magniceps | |
| Hieracium marginatum | |
| Hieracium maritimum | |
| Hieracium marshallii | |
| Hieracium melanochloricephalum | |
| Hieracium memorabile | |
| Hieracium milesii | |
| Hieracium mirandum | |
| Hieracium molybdochroum | |
| Hieracium mucronellum | |
| Hieracium mundum | |
| Hieracium murorum agg. | |
| Hieracium naviense | |
| Hieracium neocoracinum | |
| Hieracium nidense | |
| Hieracium nitidum | |
| Hieracium northroense | |
| Hieracium notabile | |
| Hieracium oblongum | |
| Hieracium oistophyllum | |
| Hieracium optimum | |
| Hieracium orcadense | |
| Hieracium orimeles | |
| Hieracium orithales | |
| Hieracium ornatilorum | |
| Hieracium oxyodus | |
| Hieracium pachyphylloides | |
| Hieracium patale | |
| Hieracium pauculidens | |
| Hieracium pellucidum | |
| Hieracium pensum | |
| Hieracium perscitum | |
| Hieracium petrocharis | |
| Hieracium pictorum | |
| Hieracium piligerum | |
| Hieracium pilosum | |
| Hieracium placerophylloides | |
| Hieracium pollichiae | |
| Hieracium pollinarioides | |
| Hieracium pollinarium | |
| Hieracium praethulense | |
| Hieracium prenanthoides | |
| Hieracium probum | |
| Hieracium prolixum | |
| Hieracium proximum | |
| Hieracium pruinale | |
| Hieracium pseudanglicoides | |
| Hieracium pseudanglicum | |
| Hieracium pseudocurvatum | |
| Hieracium pseudoleyi | |
| Hieracium pseudopetiolatum | |
| Hieracium pseudosarcophyllum | |
| Hieracium pseudostenstroemii | |
| Hieracium pugsleyi | |
| Hieracium pulchrius | |
| Hieracium pulmonarioides | |
| Hieracium pycnotrichum | |
| Hieracium radyrense | |
| Hieracium rectulum | |
| Hieracium repandulare | |
| Hieracium reticulatum | |
| Hieracium rhomboides | |
| Hieracium riddelsdellii | |
| Hieracium rigens | |
| Hieracium rivale | |
| Hieracium rubiginosum | |
| Hieracium sabaudum | |
| Hieracium salticola | |
| Hieracium sanguineum | |
| Hieracium sarcophylloides | |
| Hieracium saxorum | |
| Hieracium scabrisetum | |
| Hieracium scarpicum | |
| Hieracium schmidtii | |
| Hieracium scoticum | |
| Hieracium scotostictum | |
| Hieracium scullyi | |
| Hieracium sect. Hieracium exotericum agg. | |
| Hieracium senescens | |
| Hieracium severiceps | |
| Hieracium shoolbredii | |
| Hieracium silvaticoides | |
| Hieracium sinuans | |
| Hieracium snowdoniense | |
| Hieracium solum | |
| Hieracium sommerfeltii | |
| Hieracium sparsifolium | |
| Hieracium sparsifrons | |
| Hieracium speluncarum | |
| Hieracium spenceanum | |
| Hieracium stenolepiforme | |
| Hieracium stenopholidium | |
| Hieracium stenophyes | |
| Hieracium stenstroemii | |
| Hieracium stewartii | |
| Hieracium strictiforme | |
| Hieracium subamplifolium | |
| Hieracium subbritannicum | |
| Hieracium subcrassum | |
| Hieracium subcrocatum | |
| Hieracium subglobosum | |
| Hieracium subgracilentipes | |
| Hieracium subhirtum | |
| Hieracium subintegrifolium | |
| Hieracium sublepistoides | |
| Hieracium subminutidens | |
| Hieracium submutabile | |
| Hieracium subplanifolium | |
| Hieracium subprasinifolium | |
| Hieracium subramosum | |
| Hieracium subrude | |
| Hieracium substrigosum | |
| Hieracium subtenue | |
| Hieracium subtruncatum | |
| Hieracium subumbellatiforme | |
| Hieracium surrejanum | |
| Hieracium tavense | |
| Hieracium tenuifrons | |
| Hieracium trichocaulon | |
| Hieracium triviale | |
| Hieracium uiginskyense | |
| Hieracium uistense | |
| Hieracium uisticola | |
| Hieracium umbellatum | |
| Hieracium umbellatum ssp. bichlorophyllum | |
| Hieracium umbellatum ssp. umbellatum | |
| Hieracium vagense | |
| Hieracium vagum | |
| Hieracium variifolium | |
| Hieracium vennicontium | |
| Hieracium villosum | |
| Hieracium vinicaule | |
| Hieracium virgultorum | |
| Hieracium vulgatum | |
| Hieracium westii | |
| Hieracium zetlandicum | |
| Hieracium zygophorum | |
| Hierochloe odorata | Holy-grass |
| Himantoglossum hircinum | Lizard Orchid |
| Hippocrepis comosa | Horseshoe Vetch |
| Hippocrepis emerus | Scorpion Senna |
| Hippocrepis multisiliquosa | |
| Hippocrepis unisiliquosa | |
| Hippophae rhamnoides | Sea-Buckthorn |
| Hippuris vulgaris | Mare's-tail |
| Hirschfeldia incana | Hoary Mustard |
| Hoheria populnea | New-Zealand Mallow |
| Holcus annuus | |
| Holcus lanatus | Yorkshire-fog |
| Holcus lanatus x mollis = H. x hybridus | |
| Holcus mollis | Creeping Soft-grass |
| Holcus setiger | |
| Holodiscus discolor | Oceanspray |
| Holosteum umbellatum | Jagged Chickweed |
| Homeria collina | Cape-tulip |
| Homogyne alpina | Purple Colt's-foot |
| Homopholis proluta | |
| Honckenya peploides | Sea Sandwort |
| Hordelymus europaeus | Wood Barley |
| Hordeum bogdanii | |
| Hordeum brevisubulatum | |
| Hordeum chilense | |
| Hordeum comosum | |
| Hordeum cordobense | |
| Hordeum distichon | Two-rowed Barley |
| Hordeum euclaston | Argentine Barley |
| Hordeum flexuosum | |
| Hordeum geniculatum | Mediterranean Barley |
| Hordeum halophilum | |
| Hordeum jubatum | Foxtail Barley |
| Hordeum lechleri | |
| Hordeum marinum | Sea Barley |
| Hordeum murinum | Wall Barley |
| Hordeum murinum ssp. glaucum | |
| Hordeum murinum ssp. leporinum | |
| Hordeum murinum ssp. murinum | |
| Hordeum muticum | |
| Hordeum parodii | |
| Hordeum procerum | |
| Hordeum pubiflorum | Antarctic Barley |
| Hordeum pusillum | Little Barley |
| Hordeum secalinum | Meadow Barley |
| Hordeum stenostachys | |
| Hordeum violaceum | |
| Hordeum vulgare | Six-rowed Barley |
| Hornungia petraea | Hutchinsia |
| Hosta elata | |
| Hosta fortunei | |
| Hosta lancifolia | Narrow-leaved Plantain-lily |
| Hosta nakaiana | |
| Hosta sieboldiana | |
| Hosta ventricosa | Blue Plantain-lily |
| Hottonia palustris | Water Violet |
| Hugueninia tanacetifolia | Tansey-leaved Rocket |
| Humulus japonicus | Japanese Hop |
| Humulus lupulus | Hop |
| Huperzia selago | Fir Clubmoss |
| Hyacinthoides hispanica | Spanish Bluebell |
| Hyacinthoides italica | Italian Bluebell |
| Hyacinthoides non-scripta | Bluebell |
| Hyacinthoides non-scripta x hispanica = H. x massartiana | |
| Hyacinthus orientalis | Hyacinth |
| Hyalosperma glutinosa | Golden Sunray |
| Hydrangea anomala | Japanese Climbing-Hydrangea |
| Hydrangea macrophylla | Hydrangea |
| Hydrilla verticillata | Hydrilla |
| Hydrocharis morsus-ranae | Frogbit |
| Hydrocleys nymphoides | Water-poppy |
| Hydrocotyle moschata | Hairy Pennywort |
| Hydrocotyle novae-zeelandiae | New-Zealand Pennywort |
| Hydrocotyle ranunculoides | Floating Pennywort |
| Hydrocotyle sibthorpioides | |
| Hydrocotyle vulgaris | Marsh Pennywort |
| Hymenocarpus circinnatus | Disk Trefoil |
| Hymenophyllum tunbrigense | Tunbridge Filmy-fern |
| Hymenophyllum wilsonii | Wilson's Filmy-fern |
| Hyoscyamus albus | White Henbane |
| Hyoscyamus aureus | Golden Henbane |
| Hyoscyamus muticus | |
| Hyoscyamus niger | Henbane |
| Hyoscyamus reticulatus | |
| Hyparrhenia hirta | |
| Hypecoum imberbe | |
| Hypecoum pendulum | |
| Hypecoum procumbens | |
| Hypericum aegypticum | |
| Hypericum androsaemum | Tutsan |
| Hypericum androsaemum x hircinum = H. x inodorum | Tall Tutsan |
| Hypericum calycinum | Rose-of-Sharon |
| Hypericum canadense | Irish St John's-wort |
| Hypericum elodes | Marsh St John's-wort |
| Hypericum forrestii | Forrest's Tutsan |
| Hypericum hircinum | Stinking Tutsan |
| Hypericum hircinum ssp. majus | |
| Hypericum hirsutum | Hairy St John's-wort |
| Hypericum humifusum | Trailing St John's Wort |
| Hypericum humifusum x linariifolium | |
| Hypericum linariifolium | Toadflax-leaved St John's-wort |
| Hypericum maculatum | Imperforate St John's-Wort |
| Hypericum maculatum ssp. maculatum | |
| Hypericum maculatum ssp. obtusiusculum | |
| Hypericum montanum | Pale St John's Wort |
| Hypericum nummularium | Round-leaved St John's-wort |
| Hypericum olympicum | |
| Hypericum perforatum | Perforate St John's-Wort |
| Hypericum perforatum x maculatum = H. x desetangsii | Des Etangs' St John's-Wort |
| Hypericum pseudohenryi | Irish Tutsan |
| Hypericum pulchrum | Slender St John's Wort |
| Hypericum richeri | Alpine St John's-wort |
| Hypericum tetrapterum | Square-Stalked St John's-Wort |
| Hypericum undulatum | Wavy St John's-wort |
| Hypericum xylosteifolium | Turkish Tutsan |
| Hypochaeris achyrophorus | |
| Hypochaeris glabra | Smooth Cat's-ear |
| Hypochaeris maculata | Spotted Cat's-ear |
| Hypochaeris radicata | Cat's-ear |
| Hypochaeris radicata x glabra = H. x intermedia | |
| Hypopitys monotropa | Yellow Bird's-Nest |
| Hypopitys monotropa ssp. hypophegea | |
| Hypopitys monotropa ssp. monotropa | |
| Hyssopus officinalis | Hyssop |
| Hystrix patula | Bottle-brush-grass |
| Iberis amara | Wild Candytuft |
| Iberis crenata | |
| Iberis intermedia | |
| Iberis odorata | |
| Iberis sempervirens | Perennial Candytuft |
| Iberis umbellata | Garden Candytuft |
| Ibicella lutea | |
| Ilex aquifolium | Holly |
| Ilex aquifolium x perado = I. x altaclerensis | Highclere Holly |
| Ilex cornuta | Horned Holly |
| Illecebrum verticillatum | Coral-Necklace |
| Impatiens balfourii | Kashmir Balsam |
| Impatiens balsamina | Balsam |
| Impatiens capensis | Orange Balsam |
| Impatiens glandulifera | Indian Balsam |
| Impatiens noli-tangere | Touch-me-not Balsam |
| Impatiens parviflora | Small Balsam |
| Inula britannica | Meadow Fleabane |
| Inula conyzae | Ploughman's Spikenard |
| Inula crithmoides | Golden Samphire |
| Inula ensifolia | |
| Inula helenium | Elecampane |
| Inula hookeri | Hooker's Fleabane |
| Inula magnifica | Giant Fleabane |
| Inula oculus-christi | Hairy Fleabane |
| Inula orientalis | |
| Inula salicina | Irish Fleabane |
| Iochroma australe | Argentine-pear |
| Ipomoea batatas | Sweet-potato |
| Ipomoea hederacea | Ivy-leaved Morning-glory |
| Ipomoea lacunosa | White Morning-glory |
| Ipomoea muricata | |
| Ipomoea purpurea | Common Morning-glory |
| Ipomoea trichocarpa | |
| Ipomoea tricolor | Morning-glory |
| Ipomopsis congesta | |
| Iris chrysographes | |
| Iris danfordiae | |
| Iris ensata | Beaked Iris |
| Iris filifolia x tingitana = I. x hollandica | Dutch Iris |
| Iris foetidissima | Stinking Iris |
| Iris germanica | Bearded Iris |
| Iris laevigata | Japanese Iris |
| Iris latifolia | English Iris |
| Iris orientalis | Turkish Iris |
| Iris pseudacorus | Yellow Iris |
| Iris pumila | Pygmy Iris |
| Iris reticulata | |
| Iris sibirica | Siberian Iris |
| Iris sofarana | Mourning Iris |
| Iris spuria | Blue Iris |
| Iris unguicularis | Algerian Iris |
| Iris variegata | |
| Iris versicolor | Purple Iris |
| Iris versicolor x virginica = I. x robusta | Windermere Iris |
| Iris xiphium | Spanish Iris |
| Isatis glauca | |
| Isatis lusitanica | |
| Isatis tinctoria | Woad |
| Ismelia carinata | Tricolour Chrysanthemum |
| Isoetes echinospora | Spring Quillwort |
| Isoetes histrix | Land Quillwort |
| Isoetes lacustris | Quillwort |
| Isoetes lacustris x echinospora = I. x hickeyi | |
| Isoetopsis graminifolia | Grass-cushion |
| Isolepis cernua | Slender Club-rush |
| Isolepis setacea | Bristle Club-rush |
| Isopyrum thalictroides | Isopyrum |
| Iva ambrosiifolia | |
| Iva microcephala | |
| Iva xanthiifolia | Marsh-elder |
| Ixia campanulata | Red Corn-lily |
| Ixia maculata | |
| Ixia paniculata | Tubular Corn-lily |
| Jasione montana | Sheep's-bit |
| Jasminum beesianum | Red Jasmine |
| Jasminum humile | Italian Jasmine |
| Jasminum nudiflorum | Winter Jasmine |
| Jasminum officinale | Summer Jasmine |
| Jonopsidium acaule | Violet Cress |
| Jovellana sinclairii | |
| Jovibarba sobolifera | Hens-and-chickens House-leek |
| Juglans nigra | Black Walnut |
| Juglans regia | Walnut |
| Juncus acutiflorus | Sharp-Flowered Rush |
| Juncus acutus | Sharp Rush |
| Juncus alpinoarticulatus | Alpine Rush |
| Juncus alpinoarticulatus x articulatus = J. x buchenaui | |
| Juncus aridicola | Tussock Rush |
| Juncus articulatus | Jointed Rush |
| Juncus articulatus x acutiflorus = J. x surrejanus | |
| Juncus australis | Austral Rush |
| Juncus balticus | Baltic Rush |
| Juncus balticus x effusus = J. x obotritorum | |
| Juncus balticus x inflexus | |
| Juncus biglumis | Two-flowered Rush |
| Juncus bufonius | Toad Rush |
| Juncus bufonius agg. | |
| Juncus bulbosus | Bulbous Rush |
| Juncus capitatus | Dwarf Rush |
| Juncus castaneus | Chestnut Rush |
| Juncus compressus | Round-fruited Rush |
| Juncus conglomeratus | Compact Rush |
| Juncus continuus | |
| Juncus distegus | |
| Juncus effusus | Soft Rush |
| Juncus effusus x conglomeratus = J. x kern-reichgeltii | |
| Juncus effusus x pallidus | |
| Juncus ensifolius | Sword-leaved Rush |
| Juncus filiformis | Thread Rush |
| Juncus flavidus | |
| Juncus foliosus | Leafy Rush |
| Juncus gerardii | Saltmarsh Rush |
| Juncus gregiflorus | |
| Juncus hybridus | |
| Juncus imbricatus | |
| Juncus inflexus | Hard Rush |
| Juncus inflexus x effusus = J. x diffusus | |
| Juncus inflexus x pallidus | |
| Juncus involucratus | |
| Juncus maritimus | Sea Rush |
| Juncus ochrocoleus | |
| Juncus oxycarpus | |
| Juncus pallidus | Great Soft-rush |
| Juncus pauciflorus | Loose-flowered Rush |
| Juncus planifolius | Broad-leaved Rush |
| Juncus procerus | |
| Juncus pygmaeus | Pigmy Rush |
| Juncus radula | Hoary Rush |
| Juncus ranarius | Frog Rush |
| Juncus sarophorus | |
| Juncus squarrosus | Heath Rush |
| Juncus subnodulosus | Blunt-flowered Rush |
| Juncus subsecundus | Fingered Rush |
| Juncus subulatus | Somerset Rush |
| Juncus tenuis | Slender Rush |
| Juncus trifidus | Three-leaved Rush |
| Juncus triglumis | Three-flowered Rush |
| Juncus uruguensis | |
| Juncus usitatus | |
| Juncus vaginatus | Clustered Rush |
| Juniperus chinensis | Chinese Juniper |
| Juniperus communis | Juniper |
| Juniperus communis ssp. communis | Common Juniper |
| Juniperus communis ssp. hemisphaerica | |
| Juniperus communis ssp. nana | Dwarf Juniper |
| Juniperus recurva | Himalayan Juniper |
| Juniperus virginiana | Virginian Juniper |
| Kalanchoe blossfeldiana | Flaming Katy |
| Kalmia angustifolia | Sheep-laurel |
| Kalmia latifolia | Mountain-Laurel |
| Kalmia polifolia | Bog-laurel |
| Kernera saxatilis | Kernera |
| Kerria japonica | Kerria |
| Kickxia elatine | Sharp-Leaved Fluellen |
| Kickxia elatine ssp. crinita | |
| Kickxia elatine ssp. elatine | |
| Kickxia spuria | Round-Leaved Fluellen |
| Kitaibela vitifolia | |
| Knautia arvensis | Field Scabious |
| Knautia dipsacifolia | |
| Kniphofia praecox | Greater Red-hot-Poker |
| Kniphofia rufa | |
| Kniphofia uvaria | Red-hot-poker |
| Kobresia simpliciuscula | False Sedge |
| Koeleria macrantha | Crested Hair-Grass |
| Koeleria vallesiana | Somerset Hair-grass |
| Koeleria vallesiana x macrantha | |
| Koelreuteria paniculata | Pride-of-India |
| Koenigia islandica | Iceland-purslane |
| Kolkwitzia amabilis | Beauty-bush |
| Lablab purpureus | Lablab-bean |
| Laburnum alpinum | Scottish Laburnum |
| Laburnum anagyroides | Laburnum |
| Laburnum anagyroides x alpinum = L. x watereri | |
| Lactuca perennis | Mountain Lettuce |
| Lactuca saligna | Least Lettuce |
| Lactuca sativa | Garden Lettuce |
| Lactuca serriola | Prickly Lettuce |
| Lactuca tatarica | Blue Lettuce |
| Lactuca viminea | Pliant Lettuce |
| Lactuca virosa | Great Lettuce |
| Lagarosiphon major | Curly Waterweed |
| Lagenaria siceraria | White-flowered Gourd |
| Lagurus ovatus | Hare's-tail |
| Lallemantia iberica | |
| Lallemantia peltata | |
| Lamarckia aurea | Golden Dog's-tail |
| Lamiastrum galeobdolon | Yellow Archangel |
| Lamiastrum galeobdolon ssp. argentatum | |
| Lamiastrum galeobdolon ssp. galeobdolon | |
| Lamiastrum galeobdolon ssp. montanum | |
| Lamium album | White Dead-Nettle |
| Lamium amplexicaule | Henbit Dead-Nettle |
| Lamium bifidum | |
| Lamium confertum | Northern Dead-nettle |
| Lamium garganicum | |
| Lamium hybridum | Cut-Leaved Dead-Nettle |
| Lamium maculatum | Spotted Dead-Nettle |
| Lamium orvala | Balm-leaved Archangel |
| Lamium purpureum | Red Dead-Nettle |
| Lampranthus conspicuus | |
| Lampranthus falciformis | Sickle-leaved Dewplant |
| Lampranthus roseus | Rosy Dewplant |
| Lampranthus scaber | |
| Lampranthus spectabilis | |
| Lamprocapnos spectabilis | Asian Bleeding-heart |
| Lamprothamnium papulosum | Foxtail Stonewort |
| Lappula deflexa | Nodding Stickseed |
| Lappula echinophora | |
| Lappula marginata | |
| Lappula squarrosa | Bur Forget-me-not |
| Lappula szovitsiana | |
| Lapsana communis | Nipplewort |
| Lapsana communis ssp. communis | |
| Lapsana communis ssp. intermedia | |
| Larix decidua | European Larch |
| Larix decidua x kaempferi = L. x marschlinsii | Hybrid Larch |
| Larix gmelinii | Dahurian Larch |
| Larix kaempferi | Japanese Larch |
| Larix laricina | American Larch |
| Laser trilobum | Laser |
| Laserpitium latifolium | Broad-leaved Sermountain |
| Lasiospermum bipinnatum | Royal Down-flower |
| Lasthenia glabrata | Yellow-rayed Lasthenia |
| Lasthenia platycarpha | Alkali Goldfields |
| Lathraea clandestina | Purple Toothwort |
| Lathraea squamaria | Toothwort |
| Lathyrus angulatus | Angular Pea |
| Lathyrus annuus | Fodder Pea |
| Lathyrus aphaca | Yellow Vetchling |
| Lathyrus blepharicarpus | |
| Lathyrus cicera | Red Vetchling |
| Lathyrus clymenum | |
| Lathyrus gorgoni | |
| Lathyrus grandiflorus | Two-Flowered Everlasting-Pea |
| Lathyrus heterophyllus | Norfolk Everlasting-pea |
| Lathyrus hierosolymitanus | |
| Lathyrus hirsutus | Hairy Vetchling |
| Lathyrus inconspicuus | |
| Lathyrus japonicus | Sea Pea |
| Lathyrus japonicus ssp. maritimus | |
| Lathyrus latifolius | Broad-Leaved Everlasting-Pea |
| Lathyrus linifolius | Bitter Vetch |
| Lathyrus marmoratus | |
| Lathyrus niger | Black Pea |
| Lathyrus nissolia | Grass Vetchling |
| Lathyrus ochrus | Winged Vetchling |
| Lathyrus odoratus | Sweet Pea |
| Lathyrus palustris | Marsh Pea |
| Lathyrus palustris ssp. palustris | |
| Lathyrus palustris ssp. pilosus | |
| Lathyrus pratensis | Meadow Vetchling |
| Lathyrus rotundifolius | Round-leaved Vetchling |
| Lathyrus sativus | Indian Pea |
| Lathyrus saxatilis | |
| Lathyrus setifolius | Brown Vetchling |
| Lathyrus sphaericus | Round-seeded Vetchling |
| Lathyrus sylvestris | Narrow-Leaved Everlasting-Pea |
| Lathyrus tingitanus | Tangier Pea |
| Lathyrus tuberosus | Tuberous Pea |
| Laurus nobilis | Bay |
| Lavandula angustifolia | Garden Lavender |
| Lavandula angustifolia x latifolia = L. x intermedia | Hybrid Lavender |
| Lavandula latifolia | Broad-leaved Lavender |
| Layia chrysanthemoides | Smooth Layia |
| Ledum palustre | Labrador-tea |
| Ledum palustre ssp. groenlandicum | |
| Leersia oryzoides | Cut-grass |
| Legousia falcata | |
| Legousia hybrida | Venuss Looking Glass |
| Legousia pentagonia | |
| Legousia speculum-veneris | Large Venus's Looking Glass |
| Lemna gibba | Fat Duckweed |
| Lemna minor | Common Duckweed |
| Lemna minuta | Least Duckweed |
| Lemna trisulca | Ivy-leaved Duckweed |
| Lens culinaris | Lentil |
| Lens nigricans | |
| Leontodon hispidus | Rough Hawkbit |
| Leontodon hispidus ssp. danubialis | |
| Leontodon hispidus x saxatilis | |
| Leontodon muelleri | |
| Leontodon salzmannii | |
| Leontodon saxatilis | Lesser Hawkbit |
| Leontopodium alpinum | Edelweiss |
| Leonurus cardiaca | Motherwort |
| Leonurus marrubiastrum | False Motherwort |
| Lepidium aletes | |
| Lepidium aucheri | |
| Lepidium bipinnatifidum | Wayside Pepperwort |
| Lepidium bonariense | Argentine Pepperwort |
| Lepidium campestre | Field Pepperwort |
| Lepidium capense | |
| Lepidium desertorum | |
| Lepidium desvauxii | Bushy Pepperwort |
| Lepidium didymus | Lesser Swine-Cress |
| Lepidium draba | Hoary Cress |
| Lepidium draba ssp. chalepense | |
| Lepidium draba ssp. draba | |
| Lepidium fallax | |
| Lepidium fasciculatum | Bundled Pepperwort |
| Lepidium graminifolium | Tall Pepperwort |
| Lepidium heterophyllum | Smith's Pepperwort |
| Lepidium hirtum | |
| Lepidium hyssopifolium | African Pepperwort |
| Lepidium lasiocarpum | |
| Lepidium latifolium | Dittander |
| Lepidium lyratum | |
| Lepidium monoplocoides | Winged Pepperwort |
| Lepidium montanum | |
| Lepidium oxytrichum | |
| Lepidium papillosum | Warty Pepperwort |
| Lepidium peregrinum | |
| Lepidium perfoliatum | Perfoliate Pepperwort |
| Lepidium pinnatifidum | |
| Lepidium pseudodidymum | |
| Lepidium pseudohyssopifolium | |
| Lepidium pseudoruderale | |
| Lepidium ruderale | Narrow-Leaved Pepperwort |
| Lepidium sagittulatum | |
| Lepidium sativum | Garden Cress |
| Lepidium schinzii | |
| Lepidium spicatum | |
| Lepidium spinosum | |
| Lepidium strictum | |
| Lepidium coronopus | Swine-Cress |
| Lepidium villarsii | |
| Lepidium virginicum | Least Pepperwort |
| Leptochloa ciliolata | |
| Leptochloa decipiens | |
| Leptochloa divaricatissima | |
| Leptochloa fascicularis | |
| Leptochloa fusca | Brown Beetle-grass |
| Leptochloa muelleri | |
| Leptochloa peacockii | |
| Leptochloa uninervia | |
| Leptolepia novae-zelandiae | |
| Leptorhynchos squamatus | Scaly-buttons |
| Leptospermum lanigerum | Woolly Tea-tree |
| Leptospermum liversidgei | Lemon-scented Tea-tree |
| Leptospermum scoparium | Broom Tea-tree |
| Leptospermum sericeum | Swamp Tea-tree |
| Lepyrodiclis holosteoides | |
| Lepyrodiclis stellarioides | |
| Leucanthemella serotina | Autumn Oxeye |
| Leucanthemum atratum | Saw-leaved Moon-daisy |
| Leucanthemum lacustre | Portuguese Swamp-daisy |
| Leucanthemum lacustre x maximum = L. x superbum | Shasta Daisy |
| Leucanthemum maximum | |
| Leucanthemum monspeliense | |
| Leucanthemum paludosum | |
| Leucanthemum vulgare | Oxeye Daisy |
| Leucojum aestivum | Summer Snowflake |
| Leucojum aestivum ssp. aestivum | |
| Leucojum aestivum ssp. pulchellum | |
| Leucojum vernum | Spring Snowflake |
| Leucothoe fontanesiana | Fetter-bush |
| Levisticum officinale | Lovage |
| Leycesteria formosa | Himalayan Honeysuckle |
| Leymus arenarius | Lyme-grass |
| Leymus karelinii | |
| Leymus paboanus | |
| Leymus secalinus | |
| Leysera capillifolia | |
| Leysera tenella | |
| Liatris ligulistylis | |
| Libertia caerulescens | |
| Libertia elegans | Lesser Chilean-iris |
| Libertia formosa | Chilean-iris |
| Libocedrus chilensis | Chilean Incense-cedar |
| Ligularia dentata | Leopardplant |
| Ligularia fischeri | |
| Ligularia japonica | |
| Ligularia przewalskii | Przewalski's Leopardplant |
| Ligusticum scoticum | Scots Lovage |
| Ligustrum lucidum | Tree Privet |
| Ligustrum ovalifolium | Garden Privet |
| Ligustrum sinensis | Chinese Privet |
| Ligustrum strongylophyllum | |
| Ligustrum vulgare | Wild Privet |
| Ligustrum vulgare agg. | |
| Ligustrum vulgare x ovalifolium = L. x vicaryi | |
| Lilium bulbiferum | Orange-lily |
| Lilium canadense | Canada Lily |
| Lilium candidum | Madonna Lily |
| Lilium martagon | Martagon Lily |
| Lilium monodelphum | Caucasian Lily |
| Lilium pomponium | |
| Lilium pyrenaicum | Pyrenean Lily |
| Lilium regale | Royal Lily |
| Lilium regale x sargentiae = L. x imperiale | |
| Limnanthes douglasii | Meadow-Foam |
| Limonium auriculae-ursifolium | Broad-leaved Sea-lavender |
| Limonium bellidifolium | Matted Sea-lavender |
| Limonium binervosum | Rock Sea-Lavender |
| Limonium binervosum ssp. anglicum | |
| Limonium binervosum ssp. binervosum | |
| Limonium binervosum ssp. cantianum | |
| Limonium binervosum ssp. mutatum | |
| Limonium binervosum ssp. sarniense | |
| Limonium binervosum ssp. saxonicum | |
| Limonium bonduellii | Algerian Statice |
| Limonium britannicum | |
| Limonium britannicum ssp. britannicum | |
| Limonium britannicum ssp. celticum | |
| Limonium britannicum ssp. coombense | |
| Limonium britannicum ssp. transcanalis | |
| Limonium dodartiforme | |
| Limonium humile | Lax-Flowered Sea-Lavender |
| Limonium hyblaeum | Rottingdean Sea-lavender |
| Limonium loganicum | |
| Limonium normannicum | Alderney Sea-lavender |
| Limonium paradoxum | |
| Limonium parvum | |
| Limonium platyphyllum | Florist's Sea-lavender |
| Limonium procerum | |
| Limonium procerum ssp. cambrense | |
| Limonium procerum ssp. devoniense | |
| Limonium procerum ssp. procerum | |
| Limonium recurvum | |
| Limonium recurvum ssp. humile | |
| Limonium recurvum ssp. portlandicum | |
| Limonium recurvum ssp. pseudotranswallianum | |
| Limonium recurvum ssp. recurvum | |
| Limonium sinuatum | Statice |
| Limonium transwallianum | |
| Limonium vulgare | Common Sea-Lavender |
| Limonium vulgare x humile = L. x neumanii | |
| Limosella aquatica | Mudwort |
| Limosella aquatica x australis | |
| Limosella australis | Welsh Mudwort |
| Limosella capensis | |
| Linanthus androsaceus | |
| Linanthus grandiflorus | |
| Linaria aeruginea | |
| Linaria alpina | |
| Linaria angustissima | Narrow-leaved Toadflax |
| Linaria anticaria | |
| Linaria arenaria | Sand Toadflax |
| Linaria arvensis | Corn Toadflax |
| Linaria bipartita | |
| Linaria caesia | |
| Linaria chalepensis | |
| Linaria dalmatica | Balkan Toadflax |
| Linaria incarnata | |
| Linaria maroccana | Annual Toadflax |
| Linaria micrantha | |
| Linaria pelisseriana | Jersey Toadflax |
| Linaria purpurea | Purple Toadflax |
| Linaria purpurea x repens = L. x dominii | |
| Linaria reflexa | |
| Linaria repens | Pale Toadflax |
| Linaria repens x supina = L. x cornubiensis | |
| Linaria saxatilis | |
| Linaria simplex | |
| Linaria spartea | |
| Linaria supina | Prostrate Toadflax |
| Linaria triphylla | |
| Linaria viscosa | |
| Linaria vulgaris | Common Toadflax |
| Linaria vulgaris x repens = L. x sepium | |
| Linnaea borealis | Twinflower |
| Linum austriacum | |
| Linum bienne | Pale Flax |
| Linum catharticum | Fairy Flax |
| Linum grandiflorum | Crimson Flax |
| Linum narbonense | |
| Linum perenne | Perennial Flax |
| Linum perenne ssp. anglicum | |
| Linum perenne ssp. montanum | |
| Linum radiola | Allseed |
| Linum suffruticosum | White Flax |
| Linum tenue | |
| Linum tenuifolium | |
| Linum usitatissimum | Flax |
| Liparis loeselii | Fen Orchid |
| Liriodendron tulipifera | Tulip-tree |
| Listera cordata | Lesser Twayblade |
| Lithodora diffusa | |
| Lithospermum arvense | Field Gromwell |
| Lithospermum officinale | Common Gromwell |
| Lithospermum purpureocaeruleum | Purple Gromwell |
| Littorella uniflora | Shoreweed |
| Lloydia serotina | Snowdon Lily |
| Lobelia dortmanna | Water Lobelia |
| Lobelia erinus | Garden Lobelia |
| Lobelia filiformis | |
| Lobelia gracilis | |
| Lobelia siphilitica | Great Lobelia |
| Lobelia urens | Heath Lobelia |
| Lobularia maritima | Sweet Alison |
| Loeflingia hispanica | |
| Loiseleuria procumbens | Trailing Azalea |
| Lolium multiflorum | Italian Rye-grass |
| Lolium perenne | Perennial Rye-grass |
| Lolium perenne x multiflorum = L. x boucheanum | |
| Lolium persicum | |
| Lolium remotum | Flaxfield Rye-grass |
| Lolium rigidum | Mediterranean Rye-grass |
| Lolium temulentum | Darnel |
| Lonas annua | African Daisy |
| Lonicera alpigena | Alpine Honeysuckle |
| Lonicera caerulea | Blue-berried Honeysuckle |
| Lonicera caprifolium | Perfoliate Honeysuckle |
| Lonicera caprifolium x etrusca = L. x italica | Garden Honeysuckle |
| Lonicera chrysantha | |
| Lonicera etrusca | Etruscan Honeysuckle |
| Lonicera fragrantissima x standishii = L. x purpusii | |
| Lonicera henryi | Henry's Honeysuckle |
| Lonicera involucrata | Californian Honeysuckle |
| Lonicera japonica | Japanese Honeysuckle |
| Lonicera morrowii | Morrow's Honeysuckle |
| Lonicera nitida | Wilson's Honeysuckle |
| Lonicera periclymenum | Honeysuckle |
| Lonicera pileata | Box-Leaved Honeysuckle |
| Lonicera standishii | |
| Lonicera syringantha | Lilac-scented Honeysuckle |
| Lonicera tatarica | Tatarian Honeysuckle |
| Lonicera trichosantha | |
| Lonicera xylosteum | Fly Honeysuckle |
| Lopezia coronata | Crown-jewels |
| Lotononis lupinifolia | |
| Lotus americanus | Prairie Trefoil |
| Lotus angustissimus | Slender Bird's-foot-trefoil |
| Lotus borbasii | |
| Lotus conimbricensis | |
| Lotus corniculatus | Common Bird's-foot-Trefoil |
| Lotus creticus | Cretan Bird's-foot-trefoil |
| Lotus cytisoides | |
| Lotus edulis | |
| Lotus jacobaeus | St James' Trefoil |
| Lotus ornithopodioides | Southern Bird's-foot-trefoil |
| Lotus palustris | |
| Lotus pedunculatus | Greater Bird's-foot-Trefoil |
| Lotus subbiflorus | Hairy Bird's-foot-trefoil |
| Lotus tenuis | Narrow-leaved Bird's-foot-trefoil |
| Ludwigia grandiflora | Uruguayan Hampshire-purslane |
| Ludwigia palustris | Hampshire-purslane |
| Ludwigia palustris x repens = L. x kentiana | False Hampshire-purslane |
| Luma apiculata | Chilean Myrtle |
| Lunaria annua | Honesty |
| Lunaria rediviva | Perennial Honesty |
| Lupinus albus | White Lupin |
| Lupinus angustifolius | Narrow-leaved Lupin |
| Lupinus arboreus | Tree Lupin |
| Lupinus arboreus x polyphyllus = L. x regalis | Russell Lupin |
| Lupinus arboreus x polyphyllus x nootkatensis | |
| Lupinus luteus | Annual Yellow-lupin |
| Lupinus micranthus | Bitter Blue-lupin |
| Lupinus nootkatensis | Nootka Lupin |
| Lupinus polyphyllus | Garden Lupin |
| Lupinus polyphyllus agg. | |
| Lupinus polyphyllus x nootkatensis = L. x pseudopolyphyllus | |
| Luronium natans | Floating Water-plantain |
| Luzula arcuata | Curved Wood-rush |
| Luzula campestris | Field Wood-Rush |
| Luzula forsteri | Southern Wood-rush |
| Luzula forsteri x pilosa = L. x borreri | |
| Luzula luzuloides | White Wood-rush |
| Luzula multiflora | Heath Wood-rush |
| Luzula multiflora ssp. congesta | |
| Luzula multiflora ssp. hibernica | |
| Luzula multiflora ssp. multiflora | |
| Luzula nivea | Snow-white Wood-Rush |
| Luzula pallidula | Fen Wood-rush |
| Luzula pilosa | Hairy Wood-Rush |
| Luzula spicata | Spiked Wood-rush |
| Luzula sylvatica | Great Wood-Rush |
| Silene alpina | Alpine Catchfly |
| Silene chalcedonica | Maltese Cross |
| Silene coronaria | Rose Campion |
| Silene coronata x fulgens = L. x haageana | |
| Silene flos-cuculi | Ragged-Robin |
| Silene flos-jovis | Flower-of-Jove |
| Silene fulgens | |
| Silene viscaria | Sticky Catchfly |
| Lycium barbarum | Duke-of-Argyll's Teaplant |
| Lycium barbarum agg. | |
| Lycium chinense | Chinese Teaplant |
| Lycocarpus fugax | |
| Lycopodiella inundata | Marsh Clubmoss |
| Lycopodium annotinum | Interrupted Clubmoss |
| Lycopodium clavatum | Stag's-horn Clubmoss |
| Lycopsis arvensis | Bugloss |
| Lycopus europaeus | Gypsywort |
| Lysichiton americanus | American Skunk-Cabbage |
| Lysichiton camtschatcensis | Asian Skunk-cabbage |
| Lysimachia ciliata | Fringed Loosestrife |
| Lysimachia ephemerum | |
| Lysimachia nemorum | Yellow Pimpernel |
| Lysimachia nummularia | Creeping Jenny |
| Lysimachia punctata | Dotted Loosestrife |
| Lysimachia quadrifolia | Whorled Loosestrife |
| Lysimachia terrestris | Lake Loosestrife |
| Lysimachia thyrsiflora | Tufted Loosestrife |
| Lysimachia vulgaris | Yellow Loosestrife |
| Lythrum alatum | Angled Purple-loosestrife |
| Lythrum hyssopifolia | Grass-poly |
| Lythrum junceum | False Grass-poly |
| Lythrum portula | Water-purslane |
| Lythrum portula ssp. longidentatum | |
| Lythrum portula ssp. portula | |
| Lythrum salicaria | Purple Loosestrife |
| Lythrum virgatum | |
| Macleaya cordata | Five-seeded Plume-poppy |
| Macleaya cordata x microcarpa = M. x kewensis | Hybrid Plume-poppy |
| Madia glomerata | Mountain Tarweed |
| Madia sativa | Coast Tarweed |
| Magnolia acuminata | Cucumber-tree |
| Mahonia aquifolium | Oregon-Grape |
| Mahonia aquifolium x repens = M. x decumbens | Newmarket Oregon-grape |
| Mahonia japonica | |
| Maianthemum bifolium | May Lily |
| Maianthemum kamtschaticum | False Lily-of-the-valley |
| Malcolmia africana | |
| Malcolmia crenulata | |
| Malcolmia maritima | Virginia Stock |
| Malope malacoides | |
| Malope trifida | Mallow-wort |
| Malus atrosanguinea x niedzwetskyana = M. x purpurea | Purple Crab |
| Malus baccata | Siberian Crab |
| Malus baccata x prunifolia = M. x robusta | |
| Malus floribunda | Japanese Crab |
| Malus hupehensis | Hupeh Crab |
| Malus prunifolia | Plum-leaved Apple |
| Malus pumila | Apple |
| Malus sieboldii | Siebold's Crab |
| Malus spectabilis | Chinese Crab |
| Malus sylvestris | Crab Apple |
| Malva aegyptia | |
| Malva alcea | Greater Musk-mallow |
| Malva arborea | Tree Mallow |
| Malva brasiliensis | |
| Malva cretica | Smaller Tree-Mallow |
| Malva hispanica | |
| Malva kashmiriana | Wild Hollyhock |
| Malva olbia x thuringiaca = L. x clementii | Garden Tree-Mallow |
| Malva maritima | Sea Mallow |
| Malva moschata | Musk-Mallow |
| Malva neglecta | Dwarf Mallow |
| Malva nicaeensis | French Mallow |
| Malva oxyloba | |
| Malva parviflora | Least Mallow |
| Malva plebeia | Australian Hollyhock |
| Malva punctata | Spotted-stalked Tree-mallow |
| Malva pusilla | Small Mallow |
| Malva setigera | Rough Marsh-mallow |
| Malva sylvestris | Common Mallow |
| Malva triloba | |
| Malva trimestris | Royal Mallow |
| Malva verticillata | Chinese Mallow |
| Malvastrum americanum | |
| Malvastrum campanulatum | |
| Malvastrum coromandelianum | Broomweed |
| Malvastrum multicaule | |
| Mangifera indica | Mango |
| Mantisalca salmantica | |
| Margyricarpus pinnatus | Pearl-fruit |
| Marrubium alysson | |
| Marrubium peregrinum | |
| Marrubium vulgare | White Horehound |
| Matricaria aurea | |
| Matricaria chamomilla | Scented Mayweed |
| Matricaria decipiens | |
| Matricaria disciformis | |
| Matricaria discoidea | Pineapple Weed |
| Matricaria oreades | Lawn Pyrethrum |
| Matricaria trichophylla | |
| Matteuccia struthiopteris | Ostrich Fern |
| Matthiola fruticulosa | Sad Stock |
| Matthiola incana | Hoary Stock |
| Matthiola longipetala | Night-scented Stock |
| Matthiola longipetala ssp. bicornis | |
| Matthiola sinuata | Sea Stock |
| Matthiola tricuspidata | |
| Meconopsis cambrica | Welsh Poppy |
| Medicago arabica | Spotted Medick |
| Medicago arborea | Tree Medick |
| Medicago blancheana | |
| Medicago coronata | |
| Medicago disciformis | |
| Medicago doliata | |
| Medicago glutinosa | |
| Medicago intertexta | Hedgehog Medick |
| Medicago laciniata | Tattered Medick |
| Medicago littoralis | Shore Medick |
| Medicago lupulina | Black Medick |
| Medicago marina | Sea Medick |
| Medicago minima | Bur Medick |
| Medicago murex | |
| Medicago noeana | |
| Medicago orbicularis | Button Medick |
| Medicago polymorpha | Toothed Medick |
| Medicago praecox | Early Medick |
| Medicago prostrata | |
| Medicago radiata | |
| Medicago rigidula | |
| Medicago rotata | |
| Medicago rugosa | |
| Medicago sativa | |
| Medicago sativa ssp. falcata | Sickle Medick |
| Medicago sativa ssp. sativa | Lucerne |
| Medicago sativa nothossp. varia | Sand Lucerne |
| Medicago scutellata | Snail Medick |
| Medicago soleirolii | |
| Medicago tenoreana | |
| Medicago tornata | |
| Medicago truncatula | Strong-spined Medick |
| Medicago turbinata | |
| Melampyrum arvense | Field Cow-Wheat |
| Melampyrum barbatum | |
| Melampyrum cristatum | Crested Cow-wheat |
| Melampyrum pratense | Common Cow-wheat |
| Melampyrum pratense ssp. commutatum | |
| Melampyrum pratense ssp. pratense | |
| Melampyrum sylvaticum | Small Cow-wheat |
| Melica ciliata | |
| Melica nutans | Mountain Melick |
| Melica uniflora | Wood Melick |
| Melica violacea | |
| Melilotus albus | White Melilot |
| Melilotus altissimus | Tall Melilot |
| Melilotus elegans | |
| Melilotus indicus | Small Melilot |
| Melilotus infestus | |
| Melilotus messanensis | Sicilian Melilot |
| Melilotus neapolitanus | |
| Melilotus officinalis | Ribbed Melilot |
| Melilotus polonicus | |
| Melilotus sulcatus | Furrowed Melilot |
| Melilotus wolgicus | |
| Melinis repens | |
| Melissa officinalis | Balm |
| Melittis melissophyllum | Bastard Balm |
| Mentha aquatica | Water Mint |
| Mentha aquatica x spicata = M. x piperita | Peppermint |
| Mentha aquatica x suaveolens = M. x suavis | |
| Mentha arvensis | Corn Mint |
| Mentha arvensis x aquatica = M. x verticillata | Whorled Mint |
| Mentha arvensis x aquatica x spicata = M. x smithiana | Tall Mint |
| Mentha arvensis x spicata = M. x gracilis | Bushy Mint |
| Mentha arvensis x suaveolens = M. x carinthiaca | |
| Mentha longifolia | Horse Mint |
| Mentha pulegium | Pennyroyal |
| Mentha requienii | Corsican Mint |
| Mentha spicata | Spear Mint |
| Mentha spicata x longifolia = M. x villosonervata | Sharp-Toothed Mint |
| Mentha spicata x suaveolens = M. x villosa | Apple Mint |
| Mentha suaveolens | Round-Leaved Mint |
| Mentha suaveolens x longifolia = M. x rotundifolia | False Apple-mint |
| Mentzelia albicaulis | White-stemmed Stickleaf |
| Mentzelia lindleyi | Golden Bartonia |
| Menyanthes trifoliata | Bogbean |
| Mercurialis annua | Annual Mercury |
| Mercurialis perennis | Dog's Mercury |
| Merremia sibirica | |
| Mertensia ciliata | |
| Mertensia maritima | Oysterplant |
| Mertensia virginica | Virginia-bluebells |
| Mesembryanthemum crystallinum | Common Iceplant |
| Mesembryanthemum nodiflorum | |
| Mespilus germanica | Medlar |
| Mespilus germanica x Crataegus laevigata = X Crataemespilus grandiflora | Haw-medlar |
| Metasequoia glyptostroboides | Dawn Redwood |
| Meum athamanticum | Spignel |
| Mibora minima | Early Sand-grass |
| Micropsis spathulata | |
| Microthlaspi perfoliatum | Perfoliate Penny-cress |
| Milium effusum | Wood Millet |
| Milium vernale | Early Millet |
| Milium vernale ssp. sarniense | |
| Millotia muelleri | Common Bow-flower |
| Millotia myosotidifolia | Broad-leaved Millotia |
| Millotia perpusilla | Tiny Bow-flower |
| Millotia tenuifolia | Soft Millotia |
| Mimulus cardinalis | Scarlet Monkeyflower |
| Mimulus guttatus | Monkeyflower |
| Mimulus guttatus x cupreus = M. x burnetii | Coppery Monkeyflower |
| Mimulus guttatus x luteus = M. x robertsii | Hybrid Monkeyflower |
| Mimulus guttatus x luteus x cupreus | |
| Mimulus luteus | Blood-drop-emlets |
| Mimulus luteus agg. | |
| Mimulus luteus x cupreus = M. x maculosus | Scottish Monkeyflower |
| Mimulus moschatus | Musk |
| Mimulus ringens | Allegheny Monkeyflower |
| Minuartia hybrida | Fine-leaved Sandwort |
| Minuartia hybrida ssp. tenuifolia | |
| Minuartia laricifolia | |
| Minuartia recurva | Recurved Sandwort |
| Minuartia rubella | Mountain Sandwort |
| Minuartia sedoides | Cyphel |
| Minuartia stricta | Teesdale Sandwort |
| Minuartia verna | Spring Sandwort |
| Mirabilis jalapa | Marvel of Peru |
| Miscanthus sacchariflorus | |
| Miscanthus sinensis | |
| Misopates calycinum | Pale Weasel's-snout |
| Misopates orontium | Weasel's Snout |
| Mitella caulescens | Star-shaped Mitrewort |
| Mitella diphylla | Two-leaved Mitrewort |
| Modiola caroliniana | Bristly-fruited Mallow |
| Moehringia trinervia | Three-Nerved Sandwort |
| Moenchia erecta | Upright Chickweed |
| Molinia caerulea | Purple Moor-Grass |
| Molinia caerulea ssp. arundinacea | |
| Molinia caerulea ssp. caerulea | |
| Moluccella laevis | Bells-of-Ireland |
| Momordica charantia | Balsam-pear |
| Monarda citriodora | Lemon Beebalm |
| Monarda didyma | |
| Moneses uniflora | One-Flowered Wintergreen |
| Monolepis nuttalliana | Povertyweed |
| Monopsis debilis | |
| Monsonia angustifolia | |
| Monsonia brevirostrata | Short-fruited Dysentery-herb |
| Montia fontana | Blinks |
| Montia fontana ssp. amporitana | |
| Montia fontana ssp. chondrosperma | |
| Montia fontana ssp. fontana | |
| Montia fontana ssp. variabilis | |
| Montia parvifolia | Small-leaved Blinks |
| Moricandia arvensis | Violet Cabbage |
| Morina longifolia | Whorl-flower |
| Morus alba | White Mulberry |
| Morus nigra | Black Mulberry |
| Muehlenbeckia complexa | Wireplant |
| Muhlenbergia distichophylla | |
| Muhlenbergia racemosa | |
| Muhlenbergia schreberi | |
| Munroa squarrosa | False Buffalo-grass |
| Muscari armeniacum | Garden Grape-Hyacinth |
| Muscari azureum | |
| Muscari botryoides | Compact Grape-hyacinth |
| Muscari comosum | Tassel Hyacinth |
| Muscari neglectum | Grape-Hyacinth |
| Myagrum perfoliatum | Mitre Cress |
| Mycelis muralis | Wall Lettuce |
| Myosotis alpestris | Alpine Forget-me-not |
| Myosotis alpina | |
| Myosotis arvensis | Field Forget-me-Not |
| Myosotis discolor | Changing Forget-me-Not |
| Myosotis dissitiflora | |
| Myosotis laxa | Tufted Forget-me-not |
| Myosotis laxa ssp. caespitosa | |
| Myosotis ramosissima | Early Forget-m-enot |
| Myosotis scorpioides | Water Forget-me-not |
| Myosotis scorpioides x laxa = M. x suzae | |
| Myosotis secunda | Creeping Forget-me-not |
| Myosotis sicula | Jersey Forget-me-not |
| Myosotis stolonifera | Pale Forget-me-not |
| Myosotis sylvatica | Wood Forget-me-Not |
| Myosotis verna | |
| Myosoton aquaticum | Water Chickweed |
| Myosurus minimus | Mousetail |
| Myrica gale | Bog Myrtle |
| Myrica pensylvanica | Bayberry |
| Myriocephalus rhizocephalus | Tufted Woolly-heads |
| Myriophyllum alterniflorum | Alternate Water-Milfoil |
| Myriophyllum aquaticum | Parrot's Feather |
| Myriophyllum heterophyllum | Various-leaved Water-milfoil |
| Myriophyllum spicatum | Spiked Water-Milfoil |
| Myriophyllum verrucosum | Red Water-milfoil |
| Myriophyllum verticillatum | Whorled Water-Milfoil |
| Myrrhis odorata | Sweet Cicely |
| Myrrhoides nodosa | |
| Myrsine africana | African Boxwood |
| Najas flexilis | Slender Naiad |
| Najas graminea | |
| Najas marina | Holly-leaved Naiad |
| Najas marina ssp. intermedia | |
| Narcissus bicolor | Two-coloured Daffodil |
| Narcissus bulbocodium | Hoop-petticoat Daffodil |
| Narcissus cyclamineus | Cyclamen-flowered Daffodil |
| Narcissus jonquilla | Jonquil |
| Narcissus minor | Lesser Daffodil |
| Narcissus papyraceus | Paper-white Daffodil |
| Narcissus poeticus | Pheasant's-Eye Daffodil |
| Narcissus poeticus ssp. poeticus | |
| Narcissus poeticus ssp. radiiflorus | |
| Narcissus poeticus x pseudonarcissus = N. x incomparabilis | Nonesuch Daffodil |
| Narcissus hispanicus | Spanish Daffodil |
| Narcissus moschatus | White Daffodil |
| Narcissus nobilis | Large-flowered Daffodil |
| Narcissus obvallaris | Tenby Daffodil |
| Narcissus macrolobus | Pale-flowered Daffodil |
| Narcissus pseudonarcissus | Daffodil |
| Narcissus pseudonarcissus x cyclamineus = N. x monochromus | Reflexed Daffodil |
| Narcissus pseudonarcissus x jonquilla = N. x odorus | Campernelle Jonquil |
| Narcissus tazetta | Bunch-Flowered Daffodil |
| Narcissus tazetta x cyclamineus = N. x cyclazetta | Head-to-head Daffodil |
| Narcissus tazetta x jonquilla = N. x intermedius | Intermediate Jonquil |
| Narcissus tazetta x poeticus = N. x medioluteus | Primrose-peerless |
| Narcissus triandrus | Angel's-tears |
| Narduroides salzmannii | |
| Nardus stricta | Mat-grass |
| Narthecium ossifragum | Bog Asphodel |
| Nassella brachychaeta | |
| Nassella brachychaetoides | |
| Nassella brachyphylla | |
| Nassella caespitosa | |
| Nassella charruana | |
| Nassella chilensis | |
| Nassella filiculmis | |
| Nassella flaccidula | |
| Nassella formicarum | |
| Nassella hyalina | |
| Nassella jurgensii | |
| Nassella pampeana | |
| Nassella philippii | |
| Nassella poeppigiana | |
| Nassella tenuis | |
| Nassella tenuissima | Argentine Needle-grass |
| Nassella trichotoma | |
| Nasturtium officinale | Narrow-Fruited Water-cress |
| Navarretia intertexta | |
| Navarretia squarrosa | Skunkweed |
| Neatostema apulum | |
| Nectaroscordum siculum | Honey Garlic |
| Nectaroscordum siculum ssp. bulgaricum | |
| Nectaroscordum siculum ssp. siculum | |
| Neillia sinensis | |
| Nemesia melissifolia | |
| Nemesia strumosa | Cape-jewels |
| Nemesia versicolor | |
| Nemophila maculata | Fivespot |
| Nemophila menziesii | Baby's-blue-eyes |
| Neopallasia pectinata | |
| Neotinea maculata | Dense-Flowered Orchid |
| Neottia nidus-avis | Bird's-Nest Orchid |
| Neottia ovata | Common Twayblade |
| Nepeta cataria | Cat-mint |
| Nepeta grandiflora | |
| Nepeta nepetella | Lesser Cat-mint |
| Nepeta nepetella x racemosa = N. x faassenii | Garden Catmint |
| Nepeta nuda | Hairless Cat-mint |
| Nerine bowdenii | |
| Nerine sarniensis | Guernsey Lily |
| Nertera granadensis | Beadplant |
| Neslia paniculata | Ball Mustard |
| Nicandra physalodes | Apple-of-Peru |
| Nicotiana acuminata | |
| Nicotiana alata | Sweet Tobacco |
| Nicotiana alata x forgetiana = N. x sanderae | |
| Nicotiana forgetiana | Red Tobacco |
| Nicotiana glauca | Tree Tobacco |
| Nicotiana goodspeedii | Small-flowered Tobacco |
| Nicotiana ingulba | |
| Nicotiana langsdorfii | |
| Nicotiana longiflora | Long-flowered Tobacco |
| Nicotiana occidentalis | Native Tobacco |
| Nicotiana rustica | Wild Tobacco |
| Nicotiana suaveolens | Australian Tobacco |
| Nicotiana sylvestris | |
| Nicotiana tabacum | Tobacco |
| Nicotiana velutina | Velvet Tobacco |
| Nigella arvensis | Nigella |
| Nigella damascena | Love-in-a-Mist |
| Nigella gallica | Pale Fennel-flower |
| Nigella hispanica | Fennel-flower |
| Nigella sativa | Black-cumin |
| Nitella capillaris | Slimy-fruited Stonewort |
| Nitella confervacea | Least Stonewort |
| Nitella flexilis | Smooth Stonewort |
| Nitella gracilis | Slender Stonewort |
| Nitella hyalina | Many-branched Stonewort |
| Nitella mucronata | Pointed Stonewort |
| Nitella mucronata var. gracillima | |
| Nitella mucronata var. mucronata | |
| Nitella opaca | Dark Stonewort |
| Nitella spanioclema | Few-branched Stonewort |
| Nitella tenuissima | Dwarf Stonewort |
| Nitella translucens | Translucent Stonewort |
| Nitellopsis obtusa | Starry Stonewort |
| Nolana acuminata | |
| Nolana humifusa | Trailing Chilean-bellflower |
| Nolana paradoxa | Chilean-bellflower |
| Nonea caspica | |
| Nonea lutea | Yellow Nonea |
| Nonea pulla | Brown Nonea |
| Nonea rosea | Pink Nonea |
| Nonea ventricosa | |
| Nonea vesicaria | |
| Nothofagus alpina | Rauli |
| Nothofagus antarctica | Antarctic Beech |
| Nothofagus dombeyi | Dombey's Beech |
| Nothofagus obliqua | Roble |
| Nothofagus obliqua x alpina = N. x dodecaphleps | |
| Nothoscordum borbonicum | Honeybells |
| Notobasis syriaca | Syrian Thistle |
| Nuphar advena | Spatter-dock |
| Nuphar lutea | Yellow Water-Lily |
| Nuphar lutea x pumila = N. x spenneriana | Hybrid Water-lily |
| Nuphar pumila | Least Water-lily |
| Nuttallanthus canadensis | |
| Nymphaea alba | White Water-Lily |
| Nymphaea alba ssp. alba | |
| Nymphaea alba ssp. occidentalis | |
| Nymphaea odorata | Fragrant Water-lily |
| Nymphoides peltata | Fringed Water-Lily |
| Ochagavia carnea | Tresco Rhodostachys |
| Ochthodium aegyptiacum | |
| Ocimum basilicum | Sweet Basil |
| Ocimum micranthum | Wild Basil |
| Odontites jaubertianus | French Bartsia |
| Odontites jaubertianus ssp. chrysanthus | |
| Odontites vernus | Red Bartsia |
| Odontites vernus ssp. litoralis | |
| Odontites vernus ssp. serotinus | |
| Odontites vernus ssp. vernus | |
| Oemleria cerasiformis | Osoberry |
| Oenanthe aquatica | Fine-Leaved Water-Dropwort |
| Oenanthe crocata | Hemlock Water-Dropwort |
| Oenanthe fistulosa | Tubular Water-Dropwort |
| Oenanthe fluviatilis | River Water-dropwort |
| Oenanthe lachenalii | Parsley Water-Dropwort |
| Oenanthe pimpinelloides | Corky-Fruited Water-Dropwort |
| Oenanthe silaifolia | Narrow-leaved Water-dropwort |
| Oenothera affinis | |
| Oenothera biennis | Common Evening-Primrose |
| Oenothera biennis x cambrica | |
| Oenothera canovirens | |
| Oenothera drummondii | |
| Oenothera glazioviana | Large-Flowered Evening-Primrose |
| Oenothera glazioviana x biennis = O. x fallax | |
| Oenothera glazioviana x biennis x cambrica | |
| Oenothera glazioviana x cambrica = O. x britannica | |
| Oenothera humifusa | |
| Oenothera indecora | |
| Oenothera laciniata | Cut-leaved Evening-primrose |
| Oenothera lipsiensis | |
| Oenothera missouriensis | Missouri Evening-primrose |
| Oenothera oakesiana | |
| Oenothera parviflora | |
| Oenothera perennis | Small Sundrops |
| Oenothera rosea | Rosy Evening-primrose |
| Oenothera rubricaulis | |
| Oenothera rubricuspis | |
| Oenothera salicifolia | |
| Oenothera stricta | Fragrant Evening Primrose |
| Oenothera tetraptera | |
| Oenothera victorinii | Victorin's Evening-primrose |
| Olearia avicenniifolia | Mangrove-leaved Daisy-bush |
| Olearia avicenniifolia x moschata = O. x haastii | Daisy-bush |
| Olearia ilicifolia | Maori-holly |
| Olearia macrodonta | New-Zealand Holly |
| Olearia nummulariifolia | Sticky Daisy-bush |
| Olearia paniculata | Akiraho |
| Olearia solandri | Coastal Daisy-bush |
| Olearia traversii | Ake-ake |
| Omphalodes linifolia | |
| Omphalodes verna | Blue-eyed-Mary |
| Oncosiphon grandiflorum | |
| Oncosiphon piluliferum | Stink-net |
| Oncosiphon suffruticosum | |
| Onobrychis aequidentata | |
| Onobrychis alba | |
| Onobrychis caput-galli | Cockscomb Sainfoin |
| Onobrychis crista-galli | |
| Onobrychis viciifolia | Sainfoin |
| Onoclea sensibilis | Sensitive Fern |
| Ononis alopecuroides | Salzmann's Restharrow |
| Ononis baetica | Andalucian Restharrow |
| Ononis mitissima | Mediterranean Restharrow |
| Ononis natrix | Yellow Restharrow |
| Ononis reclinata | Small Restharrow |
| Ononis repens | Common Restharrow |
| Ononis repens ssp. maritima | |
| Ononis repens ssp. repens | |
| Ononis serrata | |
| Ononis spinosa | Spiny Restharrow |
| Ononis spinosa x repens = O. x pseudohircina | |
| Ononis viscosa | |
| Onopordum acanthium | Cotton Thistle |
| Onopordum illyricum | Illyrian Thistle |
| Onopordum macracanthum | |
| Onopordum nervosum | Reticulate Thistle |
| Onopordum tauricum | |
| Ophioglossum azoricum | Small Adder's-tongue |
| Ophioglossum lusitanicum | Least Adder's-tongue |
| Ophioglossum vulgatum | Adder's-tongue |
| Ophrys apifera | Bee Orchid |
| Ophrys apifera x fuciflora = O. x albertiana | |
| Ophrys bertolonii | |
| Ophrys fuciflora | Late Spider-orchid |
| Ophrys insectifera | Fly Orchid |
| Ophrys insectifera x apifera | |
| Ophrys insectifera x sphegodes = O. x hybrida | |
| Ophrys sphegodes | Early Spider-Orchid |
| Ophrys sphegodes x fuciflora = O. x obscura | |
| Orchis anthropophorum | Man Orchid |
| Orchis laxiflora | Loose-Flowered Orchid |
| Orchis laxiflora x morio = O. x alata | |
| Orchis mascula | Early-Purple Orchid |
| Orchis mascula x morio = O. x morioides | |
| Orchis militaris | Military Orchid |
| Orchis militaris x simia = O. x beyrichii | |
| Orchis morio | Green-Winged Orchid |
| Orchis pallens | Pale-flowered Orchid |
| Orchis palustris | |
| Orchis purpurea | Lady Orchid |
| Orchis purpurea x Orchis anthropophorum = X OrchiOrchis meilscheimeri | |
| Orchis simia | Monkey Orchid |
| Orchis simia x Orchis anthropophorum = X OrchiOrchis bergonii | |
| Orchis ustulata | Burnt Orchid |
| Oreopteris limbosperma | Lemon-Scented Fern |
| Origanum majorana | Pot Marjoram |
| Origanum onites | |
| Origanum virens | |
| Origanum vulgare | Wild Marjoram |
| Orlaya daucoides | Flat-fruited Orlaya |
| Orlaya grandiflora | Large-flowered Orlaya |
| Ornithogalum umbellatum ssp. campestre | Star-of-Bethlehem |
| Ornithogalum arabicum | |
| Ornithogalum narbonense | |
| Ornithogalum nutans | Drooping Star-of-Bethlehem |
| Ornithogalum pyrenaicum | Spiked Star-of-Bethlehem |
| Ornithogalum thyrsoides | Chincherinchee |
| Ornithogalum umbellatum | Garden Star-of-Bethlehem |
| Ornithopus compressus | Yellow Serradella |
| Ornithopus perpusillus | Bird's-Foot |
| Ornithopus pinnatus | Orange Bird's-foot |
| Ornithopus sativus | Serradella |
| Orobanche aegyptiaca | |
| Orobanche alba | Thyme Broomrape |
| Orobanche caryophyllacea | Bedstraw Broomrape |
| Orobanche crenata | Bean Broomrape |
| Orobanche elatior | Knapweed Broomrape |
| Orobanche flava | Butterbur Broomrape |
| Orobanche hederae | Ivy Broomrape |
| Orobanche lucorum | Barberry Broomrape |
| Orobanche minor | Common Broomrape |
| Orobanche picridis | Oxtongue Broomrape |
| Orobanche purpurea | Yarrow Broomrape |
| Orobanche ramosa | Hemp Broomrape |
| Orobanche rapum-genistae | Greater Broomrape |
| Orobanche reticulata | Thistle Broomrape |
| Orobanche reticulata ssp. pallidiflora | |
| Ortachne rariflora | |
| Orthilia secunda | Serrated Wintergreen |
| Orthocarpus erianthus | Butter-and-eggs |
| Orthocarpus purpurascens | Purple Owl-clover |
| Oryzopsis miliacea | Smilo-grass |
| Oryzopsis thomasii | |
| Oscularia deltoides | Deltoid-leaved Dewplant |
| Osmanthus decorus x delavayi = O. x burkwoodii | |
| Osmanthus heterophyllus | |
| Osmorhiza chilensis | |
| Osmunda regalis | Royal Fern |
| Osteospermum jucundum | Osteospermum |
| Otanthus maritimus | Cottonweed |
| Othonna angustifolia | |
| Oxalis acetosella | Wood-Sorrel |
| Oxalis articulata | Pink-Sorrel |
| Oxalis conorrhiza | |
| Oxalis corniculata | Procumbent Yellow-Sorrel |
| Oxalis debilis | Large-flowered Pink-sorrel |
| Oxalis decaphylla | Ten-leaved Pink-sorrel |
| Oxalis dillenii | Sussex Yellow-sorrel |
| Oxalis exilis | Least Yellow-sorrel |
| Oxalis incarnata | Pale Pink-Sorrel |
| Oxalis lasiandra | |
| Oxalis latifolia | Garden Pink-sorrel |
| Oxalis megalorrhiza | Fleshy Yellow-sorrel |
| Oxalis perennans | Woody-rooted Yellow-sorrel |
| Oxalis pes-caprae | Bermuda-buttercup |
| Oxalis purpurata | |
| Oxalis rosea | Annual Pink-sorrel |
| Oxalis stricta | Upright Yellow-sorrel |
| Oxalis tetraphylla | Four-leaved Pink-sorrel |
| Oxalis valdiviensis | Chilean Yellow-sorrel |
| Oxygonum sinuatum | |
| Oxyria digyna | Mountain Sorrel |
| Oxytropis campestris | Yellow Oxytropis |
| Oxytropis halleri | Purple Oxytropis |
| Pachysandra terminalis | Carpet Box |
| Paeonia lactiflora | Chinese Peony |
| Paeonia lutea | Yellow Tree-peony |
| Paeonia mascula | Peony |
| Paeonia officinalis | Garden Peony |
| Pancratium maritimum | Sea Daffodil |
| Panicum antidotale | |
| Panicum buncei | |
| Panicum capillare | Witch-grass |
| Panicum coloratum | |
| Panicum decompositum | |
| Panicum dichotomiflorum | Autumn Millet |
| Panicum effusum | |
| Panicum gilvum | |
| Panicum laevinode | |
| Panicum maximum | |
| Panicum miliaceum | Common Millet |
| Panicum mitchellii | |
| Panicum novemnerve | |
| Panicum obseptum | |
| Panicum queenslandicum | |
| Panicum repens | |
| Panicum schinzii | Transvaal Millet |
| Panicum stapfianum | |
| Panicum subalbidum | |
| Panicum subxerophilum | |
| Panicum virgatum | |
| Papaver aculeatum | Bristle Poppy |
| Papaver arenarium | |
| Papaver argemone | Prickly Poppy |
| Papaver atlanticum | Atlas Poppy |
| Papaver bivalve | |
| Papaver bivalve ssp. hybridum | Violet Horned-poppy |
| Papaver commutatum | |
| Papaver dubium | Long-Headed Poppy |
| Papaver lecoqii | Yellow-juiced Poppy |
| Papaver glaucum | Tulip Poppy |
| Papaver hybridum | Rough Poppy |
| Papaver laevigatum | |
| Papaver nudicaule | Iceland Poppy |
| Papaver pavoninum | Peacock Poppy |
| Papaver pseudoorientale | Oriental Poppy |
| Papaver rhoeas | Common Poppy |
| Papaver rhoeas x dubium = P. x hungaricum | |
| Papaver somniferum | Opium Poppy |
| Papaver somniferum ssp. setigerum | |
| Papaver somniferum ssp. somniferum | |
| Parapholis filiformis | |
| Parapholis incurva | Curved Hard-grass |
| Parapholis pycnantha | |
| Parapholis strigosa | Hard Grass |
| Parasenecio hastata | |
| Parentucellia latifolia | |
| Parentucellia viscosa | Yellow Bartsia |
| Parietaria judaica | Pellitory-of-the-Wall |
| Parietaria officinalis | Eastern Pellitory-of-the-wall |
| Paris quadrifolia | Herb-Paris |
| Parnassia palustris | Grass-of-Parnassus |
| Paronychia argentea | |
| Paronychia argyrocoma | Silverling |
| Paronychia brasiliana | Brasilian Nailwort |
| Paronychia polygonifolia | |
| Parthenium hysterophorus | Santa-Maria |
| Parthenocissus henryana | Chinese Virginia-creeper |
| Parthenocissus quinquefolia | Virginia-Creeper |
| Parthenocissus tricuspidata | Boston Ivy |
| Parthenocissus inserta | False Virginia-Creeper |
| Paspalidium gracile | |
| Paspalidium jubiflorum | |
| Paspalum dilatatum | Dallis-grass |
| Paspalum distichum | Water Finger-grass |
| Paspalum racemosum | |
| Passiflora caerulea | Blue Passionflower |
| Pastinaca sativa | Wild Parsnip |
| Pastinaca sativa ssp. sativa | |
| Pastinaca sativa ssp. urens | |
| Paulownia tomentosa | Foxglove Tree |
| Pavonia urens | |
| Pedicularis palustris | Marsh Lousewort |
| Pedicularis sylvatica | Lousewort |
| Pedicularis sylvatica ssp. hibernica | |
| Pedicularis sylvatica ssp. sylvatica | |
| Pedilanthus tithymaloides | Devil's-backbone |
| Pelargonium capitatum | Rose Geranium |
| Pelargonium inodorum | Kopata Geranium |
| Pelargonium tomentosum | Peppermint-scented Geranium |
| Pelargonium x hortorum | Zonal Geranium |
| Pennisetum alopecuroides | |
| Pennisetum clandestinum | |
| Pennisetum glaucum | Pearl Millet |
| Pennisetum sphacelatum | |
| Pennisetum thunbergii | |
| Pentaglottis sempervirens | Green Alkanet |
| Pentaschistis airoides | |
| Pentaschistis aristifolia | |
| Pentzia calcarea | |
| Pentzia cooperi | |
| Pentzia incana | |
| Perezia multiflora | |
| Pericallis hybrida | Cineraria |
| Perilla frutescens | |
| Persea americana | Avocado |
| Persicaria affinis | Himalayan Bistort |
| Persicaria alpina | Alpine Knotweed |
| Persicaria alpina x weyrichii = P. x fennica | Finnish Knotweed |
| Persicaria amphibia | Amphibious bistort |
| Persicaria amplexicaulis | Red Bistort |
| Persicaria arifolia | Halberd-leaved Tear-thumb |
| Persicaria bistorta | Common Bistort |
| Persicaria bungeana | |
| Persicaria campanulata | Lesser Knotweed |
| Persicaria capitata | Pink-Headed Persicaria |
| Persicaria glabra | |
| Persicaria hydropiper | Water-pepper |
| Persicaria hydropiper x minor = P. x subglandulosa | |
| Persicaria hydropiper x mitis = P. x hybrida | |
| Persicaria lapathifolia | Pale Persicaria |
| Persicaria lapathifolia x hydropiper = P. x figertii | |
| Persicaria maculosa | Redshank |
| Persicaria maculosa x hydropiper = P. x intercedens | |
| Persicaria maculosa x lapathifolia = P. x pseudolapathum | |
| Persicaria maculosa x minor = P. x brauniana | |
| Persicaria maculosa x mitis = P. x condensata | |
| Persicaria minor | Small Water-pepper |
| Persicaria mitis | Tasteless Water-pepper |
| Persicaria mitis x minor = P. x wilmsii | |
| Persicaria mollis | Soft Knotweed |
| Persicaria nepalensis | Nepal Persicaria |
| Persicaria orientale | |
| Persicaria pensylvanica | Pinkweed |
| Persicaria sagittata | American Tear-thumb |
| Persicaria senegalensis | |
| Persicaria vivipara | Alpine Bistort |
| Persicaria wallichii | Himalayan Knotweed |
| Persicaria weyrichii | Chinese Knotweed |
| Petasites albus | White Butterbur |
| Petasites fragrans | Winter Heliotrope |
| Petasites hybridus | Butterbur |
| Petasites japonicus | Giant Butterbur |
| Petasites palmatus | Palmate-leaved Butterbur |
| Petrocoptis pyrenaica | |
| Petrorhagia dubia | Hairy Pink |
| Petrorhagia nanteuilii | Childing Pink |
| Petrorhagia prolifera | Proliferous Pink |
| Petrorhagia saxifraga | Tunicflower |
| Petroselinum crispum | Garden Parsley |
| Petroselinum segetum | Corn Parsley |
| Petunia axillaris x integrifolia = P. x hybrida | Petunia |
| Peucedanum austriacum | |
| Peucedanum officinale | Hog's Fennel |
| Peucedanum ostruthium | Masterwort |
| Phacelia campanularia | California-bluebell |
| Phacelia ciliata | |
| Phacelia circinata | |
| Phacelia congesta | Blue-curls |
| Phacelia crenulata | |
| Phacelia linearis | Linear-leaved Phacelia |
| Phacelia parviflora | Small-flowered Phacelia |
| Phacelia ramosissima | Branching Phacelia |
| Phacelia tanacetifolia | Phacelia |
| Phacelia viscida | Sticky Phacelia |
| Phalaris angusta | |
| Phalaris aquatica | Bulbous Canary-grass |
| Phalaris arundinacea | Reed Canary-grass |
| Phalaris brachystachys | Confused Canary-grass |
| Phalaris canariensis | Canary-grass |
| Phalaris caroliniana | |
| Phalaris coerulescens | |
| Phalaris lemmonii | |
| Phalaris minor | Lesser Canary-grass |
| Phalaris paradoxa | Awned Canary-grass |
| Phalaris truncata | |
| Phaseolus coccineus | Runner Bean |
| Phaseolus lunatus | Butter Bean |
| Phaseolus vulgaris | French Bean |
| Phegopteris connectilis | Beech Fern |
| Philadelphus coronarius | Mock-Orange |
| Philadelphus coronarius x microphyllus x pubescens = P. x virginalis | Hairy Mock-orange |
| Philadelphus pubescens | Broad-leaved Mock-orange |
| Philadelphus subcanus | |
| Phillyrea latifolia | |
| Phleum alpinum | Alpine Cat's-tail |
| Phleum arenarium | Sand Cat's-tail |
| Phleum bertolonii | Smaller Cat's-tail |
| Phleum echinatum | |
| Phleum exaratum | |
| Phleum hirsutum | |
| Phleum paniculatum | |
| Phleum phleoides | Purple-stem Cat's-tail |
| Phleum pratense | Timothy |
| Phleum pratense agg. | |
| Phleum subulatum | |
| Phlomis fruticosa | Jerusalem Sage |
| Phlomis russeliana | Turkish Sage |
| Phlomis samia | Greek Sage |
| Phlox drummondii | Annual Phlox |
| Phlox paniculata | Phlox |
| Phlox subulata | Moss Phlox |
| Phoenix dactylifera | Date |
| Phormium cookianum | Lesser New-Zealand Flax |
| Phormium tenax | New-Zealand Flax |
| Photinia davidiana | Stranvaesia |
| Phragmites australis | Common Reed |
| Phuopsis stylosa | Caucasian Crosswort |
| Phygelius capensis | Cape Figwort |
| Phyla nodiflora | Frogfruit |
| Phyllodoce caerulea | Blue Heath |
| Phyllostachys aurea | |
| Phyllostachys bambusoides | |
| Phyllostachys flexuosa | |
| Phyllostachys nigra | |
| Phyllostachys viridiglaucescens | |
| Phymatosorus diversifolius | Kangaroo Fern |
| Physalis acutifolia | Wright's Ground-cherry |
| Physalis alkekengi | Japanese Lantern |
| Physalis angulata | Cut-leaved Ground-cherry |
| Physalis fendleri | |
| Physalis foetens | |
| Physalis ixocarpa | Tomatillo |
| Physalis minima | |
| Physalis pendula | Lance-leaved Ground-cherry |
| Physalis peruviana | Cape Gooseberry |
| Physalis philadelphica | Large-flowered Tomatillo |
| Physalis pubescens | Low Ground-cherry |
| Physalis viscosa | Stellate Ground-cherry |
| Physocarpus amurensis | |
| Physocarpus opulifolius | Ninebark |
| Physochlaina orientalis | |
| Physospermum cornubiense | Bladderseed |
| Physostegia virginiana | Obedient-plant |
| Phyteuma nigrum | Black Rampion |
| Phyteuma orbiculare | Round-Headed Rampion |
| Phyteuma scheuchzeri | Oxford Rampion |
| Phyteuma spicatum | Spiked Rampion |
| Phyteuma spicatum ssp. coeruleum | |
| Phyteuma spicatum ssp. spicatum | |
| Phytolacca acinosa | Indian Pokeweed |
| Phytolacca icosandra | Button Pokeweed |
| Phytolacca octandra | Inkweed |
| Phytolacca polyandra | Chinese Pokeweed |
| Picea abies | Norway Spruce |
| Picea asperata | Dragon Spruce |
| Picea breweriana | Brewer Spruce |
| Picea engelmannii | Engelmann Spruce |
| Picea glauca | White Spruce |
| Picea glehnii | Sakhalin Spruce |
| Picea montigena | |
| Picea omorika | Serbian Spruce |
| Picea orientalis | Oriental Spruce |
| Picea polita | Tiger-tail Spruce |
| Picea pungens | Colorado Spruce |
| Picea sitchensis | Sitka Spruce |
| Picea smithiana | Morinda Spruce |
| Picris altissima | |
| Picris cupuligera | |
| Picris hieracioides | Hawkweed Oxtongue |
| Picris hieracioides ssp. hieracioides | |
| Picris hieracioides ssp. spinulosa | |
| Picris pilosa | |
| Pieris floribunda | Mountain Fetter-bush |
| Pieris formosa | |
| Pieris japonica | |
| Pilea microphylla | Artillery-plant |
| Pilosella aurantiaca | Fox-and-Cubs |
| Pilosella aurantiaca ssp. aurantiaca | |
| Pilosella aurantiaca ssp. carpathicola | |
| Pilosella caespitosa | Yellow Fox-and-cubs |
| Pilosella caespitosa ssp. colliniformis | |
| Pilosella caespitosa x lactucella = P. x floribunda | Irish Fox-and-cubs |
| Pilosella flagellaris | Shetland Mouse-ear-hawkweed |
| Pilosella flagellaris ssp. bicapitata | |
| Pilosella flagellaris ssp. flagellaris | |
| Pilosella lactucella | |
| Pilosella officinarum | Mouse-Ear-Hawkweed |
| Pilosella officinarum x aurantiaca = P. x stoloniflora | |
| Pilosella peleteriana | Shaggy Mouse-ear-hawkweed |
| Pilosella peleteriana ssp. peleteriana | |
| Pilosella peleteriana ssp. subpeleteriana | |
| Pilosella peleteriana ssp. tenuiscapa | |
| Pilosella peleteriana x officinarum = P. x longisquama | |
| Pilosella praealta | Tall Mouse-ear-hawkweed |
| Pilosella praealta ssp. praealta | |
| Pilosella praealta ssp. thaumasia | |
| Pilularia globulifera | Pillwort |
| Pimpinella affinis | |
| Pimpinella anisum | |
| Pimpinella hirtella | |
| Pimpinella major | Greater Burnet-Saxifrage |
| Pimpinella saxifraga | Burnet-Saxifrage |
| Pinguicula alpina | Alpine Butterwort |
| Pinguicula grandiflora | Large-flowered Butterwort |
| Pinguicula lusitanica | Pale Butterwort |
| Pinguicula vulgaris | Common Butterwort |
| Pinguicula vulgaris x grandiflora = P. x scullyi | |
| Pinus ayacahuite | Mexican White-pine |
| Pinus banksiana | Jack Pine |
| Pinus cembra | Arolla Pine |
| Pinus contorta | Lodgepole Pine |
| Pinus densiflora | Japanese Pine |
| Pinus mugo | Dwarf Mountain-pine |
| Pinus muricata | Bishop Pine |
| Pinus nigra | |
| Pinus nigra ssp. laricio | Corsican Pine |
| Pinus nigra ssp. nigra | Austrian Pine |
| Pinus peuce | Macedonian Pine |
| Pinus pinaster | Maritime Pine |
| Pinus pinea | Stone Pine |
| Pinus ponderosa | Western Yellow-pine |
| Pinus radiata | Monterey Pine |
| Pinus rigida | Northern Pitch-pine |
| Pinus strobus | Weymouth Pine |
| Pinus sylvestris | Scots Pine |
| Pinus thunbergii | Japanese Black-pine |
| Pinus wallichiana | Bhutan Pine |
| Piptochaetium bicolor | |
| Piptochaetium montevidense | |
| Pistia stratiotes | Water Lettuce |
| Pistorinia hispanica | |
| Pisum fulvum | |
| Pisum sativum | Garden Pea |
| Pittosporum crassifolium | Karo |
| Pittosporum ralphii | |
| Pittosporum tenuifolium | Kohuhu |
| Plagiobothrys australasicus | |
| Plagiobothrys campestris | Fulvous Popcorn-flower |
| Plagiobothrys canescens | Valley Popcorn-flower |
| Plagiobothrys elachanthus | Hairy Forget-me-not |
| Plagiobothrys procumbens | |
| Plagiobothrys scouleri | White Forget-me-not |
| Plagiobothrys stipitatus | Stipitate Forget-me-not |
| Plantago afra | Glandular Plantain |
| Plantago albicans | |
| Plantago arenaria | Branched Plantain |
| Plantago aristata | Bracted Plantain |
| Plantago coronopus | Buck's-horn Plantain |
| Plantago exigua | |
| Plantago lagopus | Hare's-foot Plantain |
| Plantago lanceolata | Ribwort Plantain |
| Plantago loeflingii | |
| Plantago major | Greater Plantain |
| Plantago major ssp. intermedia | |
| Plantago major ssp. major | |
| Plantago maritima | Sea Plantain |
| Plantago media | Hoary Plantain |
| Plantago notata | |
| Plantago ovata | Blond Plantain |
| Plantago patagonica | |
| Plantago rugelii | Blackseed Plantain |
| Plantago sempervirens | Shrubby Plantain |
| Plantago tenuiflora | |
| Plantago varia | Variable Plantain |
| Plantago virginica | Virginian Plantain |
| Platanthera bifolia | Lesser Butterfly-Orchid |
| Platanthera chlorantha | Greater Butterfly-Orchid |
| Platanthera chlorantha x bifolia = P. x hybrida | |
| Platanus occidentalis | American Plane |
| Platanus occidentalis x orientalis = P. x hispanica | London Plane |
| Platanus orientalis | Oriental Plane |
| Platycapnos spicata | |
| Platycladus orientalis | Chinese Thuja |
| Platystemon californicus | Cream-cups |
| Pleioblastus auricomus | |
| Pleioblastus chino | Maximowicz's Bamboo |
| Pleioblastus humilis | |
| Pleioblastus pygmaeus | Dwarf Bamboo |
| Pleioblastus simonii | Simon's Bamboo |
| Poa alpina | Alpine Meadow-grass |
| Poa ampla | |
| Poa angustifolia | Narrow-leaved Meadow-grass |
| Poa annua | Annual Meadow-grass |
| Poa bulbosa | Bulbous Meadow-grass |
| Poa chaixii | Broad-leaved Meadow-grass |
| Poa compressa | Flattened Meadow-grass |
| Poa costiniana | |
| Poa flabellata | Tussac-grass |
| Poa flexuosa | Wavy Meadow-grass |
| Poa flexuosa x alpina = P. x jemtlandica | Swedish Meadow-grass |
| Poa fordeana | |
| Poa glauca | Glaucous Meadow-grass |
| Poa gunnii | |
| Poa humilis | Spreading Meadow-grass |
| Poa imbecilla | |
| Poa infirma | Early Meadow-grass |
| Poa labillardierei | |
| Poa leptoclada | |
| Poa ligularis | |
| Poa nemoralis | Wood Meadow-grass |
| Poa palustris | Swamp Meadow-grass |
| Poa poiformis | |
| Poa pratensis | Smooth Meadow-grass |
| Poa schimperiana | |
| Poa sieberiana | |
| Poa sterilis | |
| Poa trivialis | Rough Meadow-grass |
| Podolepis gracilis | Slender Podolepis |
| Podolepis longipedata | Tall Copper-wire-daisy |
| Podophyllum hexandrum | Himalayan May-apple |
| Polemonium caeruleum | Jacob's-Ladder |
| Polemonium caeruleum ssp. caeruleum | |
| Polemonium caeruleum ssp. himalayanum | |
| Polemonium foliosissimum | |
| Polemonium pauciflorum | |
| Polycarpon tetraphyllum | Four-Leaved Allseed |
| Polycnemum arvense | |
| Polygala amarella | Dwarf Milkwort |
| Polygala calcarea | Chalk Milkwort |
| Polygala chamaebuxus | Shrubby Milkwort |
| Polygala serpyllifolia | Heath Milkwort |
| Polygala vulgaris | Common Milkwort |
| Polygala vulgaris ssp. collina | |
| Polygala vulgaris ssp. vulgaris | |
| Polygala vulgaris x amarella | |
| Polygala vulgaris x calcarea | |
| Polygonatum biflorum | |
| Polygonatum multiflorum | Solomon's Seal |
| Polygonatum multiflorum agg. | |
| Polygonatum multiflorum x odoratum = P. x hybridum | Garden Solomon's-Seal |
| Polygonatum odoratum | Angular Solomon's-Seal |
| Polygonatum verticillatum | Whorled Solomon's-seal |
| Polygonum arenarium | Lesser Red-knotgrass |
| Polygonum arenarium ssp. pulchellum | |
| Polygonum arenastrum | Equal-leaved Knotgrass |
| Polygonum aviculare | Knotgrass |
| Polygonum bellardii | |
| Polygonum boreale | Northern Knotgrass |
| Polygonum cognatum | Indian Knotgrass |
| Polygonum corrigioloides | |
| Polygonum equisetiforme | |
| Polygonum graminifolium | |
| Polygonum maritimum | Sea Knotgrass |
| Polygonum oxyspermum | Ray's Knotgrass |
| Polygonum oxyspermum ssp. oxyspermum | |
| Polygonum oxyspermum ssp. raii | |
| Polygonum patulum | Red-knotgrass |
| Polygonum plebejum | Small Knotweed |
| Polygonum rurivagum | Cornfield Knotgrass |
| Polypodium cambricum | Southern Polypody |
| Polypodium interjectum | Intermediate Polypody |
| Polypodium interjectum x cambricum = P. x shivasiae | |
| Polypodium vulgare | Polypody |
| Polypodium vulgare x cambricum = P. x font-queri | |
| Polypodium vulgare x interjectum = P. x mantoniae | |
| Polypogon australis | |
| Polypogon elongatus | |
| Polypogon fugax | |
| Polypogon linearis | |
| Polypogon maritimus | |
| Polypogon monspeliensis | Annual Beard-Grass |
| Polypogon viridis | Water Bent |
| Polystichum aculeatum | Hard Shield-Fern |
| Polystichum aculeatum x lonchitis = P. x illyricum | |
| Polystichum lonchitis | Holly-fern |
| Polystichum munitum | Western Sword-fern |
| Polystichum setiferum | Soft Shield-Fern |
| Polystichum setiferum x aculeatum = P. x bicknellii | |
| Polystichum setiferum x lonchitis = P. x lonchitiforme | |
| Polystichum setiferum x munitum = P. x lesliei | |
| Poncirus trifoliata | Japanese Bitter-orange |
| Pontederia cordata | Pickerelweed |
| Populus alba | White Poplar |
| Populus alba x tremula = P. x canescens | Grey Poplar |
| Populus balsamifera | Eastern Balsam-poplar |
| Populus balsamifera x deltoides = P. x jackii | Balm-of-Gilead |
| Populus deltoides | Necklace Poplar |
| Populus laurifolia | Laurel-leaved Poplar |
| Populus maximowiczii | Japanese Balsam-poplar |
| Populus nigra | Black-poplar |
| Populus nigra ssp. betulifolia | |
| Populus nigra x balsamifera x deltoides | |
| Populus nigra x deltoides = P. x canadensis | Hybrid Black-poplar |
| Populus nigra x laurifolia = P. x berolinensis | Berlin Poplar |
| Populus tremula | Aspen |
| Populus tremuloides | American Aspen |
| Populus trichocarpa | Western Balsam-poplar |
| Populus trichocarpa x balsamifera = P. 'Balsam Spire' | Hybrid Balsam-poplar |
| Populus trichocarpa x deltoides = P. x generosa | Generous Poplar |
| Populus yunnanensis | Yunnan Poplar |
| Portulaca grandiflora | Rose-moss |
| Portulaca oleracea | Common Purslane |
| Potamogeton acutifolius | Sharp-leaved Pondweed |
| Potamogeton alpinus | Red Pondweed |
| Potamogeton alpinus x crispus = P. x olivaceus | Graceful Pondweed |
| Potamogeton alpinus x perfoliatus = P. x prussicus | |
| Potamogeton alpinus x praelongus = P. x griffithii | |
| Potamogeton berchtoldii | Small Pondweed |
| Potamogeton berchtoldii x acutifolius = P. x sudermanicus | |
| Potamogeton coloratus | Fen Pondweed |
| Potamogeton coloratus x berchtoldii = P. x lanceolatus | |
| Potamogeton coloratus x gramineus = P. x billupsii | |
| Potamogeton compressus | Grass-wrack Pondweed |
| Potamogeton crispus | Curled Pondweed |
| Potamogeton epihydrus | American Pondweed |
| Potamogeton filiformis | Slender-leaved Pondweed |
| Potamogeton filiformis x pectinatus = P. x suecicus | Swedish Pondweed |
| Potamogeton friesii | Flat-stalked Pondweed |
| Potamogeton friesii x acutifolius = P. x pseudofriesii | |
| Potamogeton friesii x crispus = P. x lintonii | Linton's Pondweed |
| Potamogeton gramineus | Various-leaved Pondweed |
| Potamogeton gramineus x alpinus = P. x nericius | |
| Potamogeton gramineus x perfoliatus = P. x nitens | Bright-leaved Pondweed |
| Potamogeton lucens | Shining Pondweed |
| Potamogeton lucens x alpinus = P. x nerviger | |
| Potamogeton lucens x crispus = P. x cadburyae | |
| Potamogeton lucens x gramineus = P. x angustifolius | Long-leaved Pondweed |
| Potamogeton lucens x perfoliatus = P. x salicifolius | Willow-leaved Pondweed |
| Potamogeton natans | Broad-leaved Pondweed |
| Potamogeton natans x berchtoldii = P. x variifolius | |
| Potamogeton natans x gramineus = P. x sparganiifolius | Ribbon-leaved Pondweed |
| Potamogeton natans x lucens = P. x fluitans | |
| Potamogeton natans x nodosus = P. x schreberi | |
| Potamogeton natans x polygonifolius = P. x gessnacensis | |
| Potamogeton nodosus | Loddon Pondweed |
| Potamogeton obtusifolius | Blunt-leaved Pondweed |
| Potamogeton pectinatus | Fennel Pondweed |
| Potamogeton pectinatus x vaginatus = P. x bottnicus | |
| Potamogeton perfoliatus | Perfoliate Pondweed |
| Potamogeton perfoliatus x crispus = P. x cooperi | Cooper's Pondweed |
| Potamogeton polygonifolius | Bog Pondweed |
| Potamogeton polygonifolius x gramineus = P. x lanceolatifolius | |
| Potamogeton praelongus | Long-stalked Pondweed |
| Potamogeton praelongus x crispus = P. x undulatus | |
| Potamogeton praelongus x perfoliatus = P. x cognatus | |
| Potamogeton pusillus | Lesser Pondweed |
| Potamogeton pusillus x trichoides = P. x grovesii | |
| Potamogeton rutilus | Shetland Pondweed |
| Potamogeton trichoides | Hairlike Pondweed |
| Potamogeton trichoides x crispus = P. x bennettii | |
| Potentilla alba | White Cinquefoil |
| Potentilla alchemilloides | Alchemilla-leaved Cinquefoil |
| Potentilla anglica | Trailing Tormentil |
| Potentilla anglica x reptans = P. x mixta | Hybrid Cinquefoil |
| Potentilla anserina | Silverweed |
| Potentilla argentea | Hoary Cinquefoil |
| Potentilla arguta | Tall Cinquefoil |
| Potentilla aurea | |
| Potentilla bifurca | |
| Potentilla canadensis | |
| Potentilla chrysantha | Thuringian Cinquefoil |
| Potentilla cinerea | Ashy Cinquefoil |
| Potentilla collina | |
| Potentilla crantzii | Alpine Cinquefoil |
| Potentilla crantzii x tabernaemontani = P. x beckii | |
| Potentilla crassinervia | |
| Potentilla cuneata | |
| Potentilla erecta | Tormentil |
| Potentilla erecta ssp. erecta | |
| Potentilla erecta ssp. strictissima | |
| Potentilla erecta x anglica = P. x suberecta | |
| Potentilla erecta x reptans = P. x italica | |
| Potentilla fruticosa | Shrubby Cinquefoil |
| Potentilla hirta | |
| Potentilla inclinata | Grey Cinquefoil |
| Potentilla indica | Yellow-flowered Strawberry |
| Potentilla intermedia | Russian Cinquefoil |
| Potentilla montana | Mountain Cinquefoil |
| Potentilla nepalensis | |
| Potentilla norvegica | Ternate-leaved Cinquefoil |
| Potentilla recta | Sulphur Cinquefoil |
| Potentilla reptans | Creeping Cinquefoil |
| Potentilla rivalis | Brook Cinquefoil |
| Potentilla rupestris | Rock Cinquefoil |
| Potentilla sterilis | Barren Strawberry |
| Potentilla supina | |
| Potentilla tabernaemontani | Spring Cinquefoil |
| Potentilla thuringiaca | |
| Potentilla tridentata | Three-toothed Cinquefoil |
| Poterium sanguisorba | |
| Poterium sanguisorba ssp. sanguisorba | Salad Burnet |
| Poterium sanguisorba ssp. balearicum | Fodder Burnet |
| Prasium majus | |
| Pratia angulata | Lawn Lobelia |
| Pratia arenaria | Chatham Island Pratia |
| Prenanthes purpurea | Purple Lettuce |
| Primula auricula | Auricula |
| Primula bulleyana | |
| Primula elatior | Oxlip |
| Primula elatior x veris = P. x media | |
| Primula farinosa | Bird's-eye Primrose |
| Primula florindae | Tibetan Cowslip |
| Primula japonica | Japanese Cowslip |
| Primula juliae | Julia's Primrose |
| Primula pulverulenta | Mealy Cowslip |
| Primula scotica | Scottish Primrose |
| Primula sikkimensis | Sikkim Cowslip |
| Primula spectabilis | Spectacular Primrose |
| Primula veris | Cowslip |
| Primula vulgaris | Primrose |
| Primula vulgaris x elatior = P. x digenea | |
| Primula vulgaris x elatior x veris = P. x murbeckii | |
| Primula vulgaris x veris = P. x polyantha | False Oxlip |
| Primula x pruhonicensis | |
| Proboscidea louisianica | Purple-flowered Devil's-claw |
| Prunella grandiflora | Large-flowered Selfheal |
| Prunella laciniata | Cut-leaved Selfheal |
| Prunella vulgaris | Selfheal |
| Prunella vulgaris x laciniata = P. x intermedia | |
| Prunus armeniaca | Apricot |
| Prunus avium | Wild Cherry |
| Prunus cerasifera | Cherry Plum |
| Prunus cerasus | Dwarf Cherry |
| Prunus cornuta | |
| Prunus domestica | Wild Plum |
| Prunus domestica ssp. domestica | |
| Prunus domestica ssp. insititia | |
| Prunus domestica ssp. italica | |
| Prunus dulcis | Almond |
| Prunus incisa | Fuji Cherry |
| Prunus laurocerasus | Cherry Laurel |
| Prunus lusitanica | Portugal Laurel |
| Prunus mahaleb | St Lucie Cherry |
| Prunus padus | Bird Cherry |
| Prunus pensylvanica | Pin Cherry |
| Prunus persica | Peach |
| Prunus pumila | |
| Prunus serotina | Rum Cherry |
| Prunus serrulata | Japanese Cherry |
| Prunus spinosa | Blackthorn |
| Prunus spinosa x domestica = P. x fruticans | |
| Pseudofumaria alba | Pale Corydalis |
| Pseudofumaria lutea | Yellow Corydalis |
| Pseudorchis albida | Small-White Orchid |
| Pseudorchis albida x Dactylorhiza maculata = X Pseudorhiza bruniana | |
| Pseudorchis albida x Gymnadenia conopsea = X Pseudadenia schweinfurthii | |
| Pseudorlaya pumila | |
| Pseudoturritis turrita | Tower Cress |
| Pseudosasa japonica | Arrow Bamboo |
| Pseudotsuga menziesii | Douglas Fir |
| Psilurus incurvus | |
| Psoralea bituminosa | Pitch Trefoil |
| Psoralea cinerea | |
| Psoralea patens | |
| Psylliostachys leptostachya | |
| Psylliostachys spicata | |
| Psylliostachys suworowii | Rat's-tail Statice |
| Pteridium aquilinum | Bracken |
| Pteridium aquilinum ssp. aquilinum | |
| Pteridium aquilinum ssp. latiusculum | Pinewood Bracken |
| Pteris cretica | Ribbon Fern |
| Pteris incompleta | Spider Brake |
| Pteris tremula | Tender Brake |
| Pteris vittata | Ladder Brake |
| Pterocarya fraxinifolia | Caucasian Wingnut |
| Puccinellia distans | |
| Puccinellia distans ssp. borealis | Northern Saltmarsh-grass |
| Puccinellia distans ssp. distans | Reflexed Saltmarsh-grass |
| Puccinellia distans x fasciculata | |
| Puccinellia distans x rupestris = P. x pannonica | |
| Puccinellia fasciculata | Borrer's Saltmarsh-Grass |
| Puccinellia festuciformis | |
| Puccinellia maritima | Common Saltmarsh-Grass |
| Puccinellia maritima x distans = P. x hybrida | |
| Puccinellia maritima x rupestris = P. x krusemaniana | |
| Puccinellia rupestris | Stiff Saltmarsh-grass |
| Pulicaria arabica | |
| Pulicaria dysenterica | Common Fleabane |
| Pulicaria paludosa | |
| Pulicaria vulgaris | Small Fleabane |
| Pulmonaria 'Mawson's Blue' | Mawson's Lungwort |
| Pulmonaria affinis | |
| Pulmonaria longifolia | Narrow-Leaved Lungwort |
| Pulmonaria montana | Mountain Lungwort |
| Pulmonaria obscura | Suffolk Lungwort |
| Pulmonaria officinalis | Lungwort |
| Pulmonaria rubra | Red Lungwort |
| Pulmonaria saccharata | Bethlehem-sage |
| Pulsatilla vulgaris | Pasque Flower |
| Punica granatum | Pomegranate |
| Puschkinia scilloides | Striped Squill |
| Pyracantha atalantoides | Gigg's Firethorn |
| Pyracantha coccinea | Firethorn |
| Pyracantha crenulata | Nepalese Firethorn |
| Pyracantha rogersiana | Asian Firethorn |
| Pyrola media | Intermediate Wintergreen |
| Pyrola minor | Common Wintergreen |
| Pyrola rotundifolia | Round-Leaved Wintergreen |
| Pyrola rotundifolia ssp. maritima | |
| Pyrola rotundifolia ssp. rotundifolia | |
| Pyrus amygdaliformis | Almond-leaved Pear |
| Pyrus communis | Pear |
| Pyrus communis agg. | |
| Pyrus cordata | Plymouth Pear |
| Pyrus pyraster | Wild Pear |
| Pyrus salicifolia | Willow-leaved Pear |
| Quercus alba | White Oak |
| Quercus canariensis | Algerian Oak |
| Quercus castaneifolia | Chestnut-leaved Oak |
| Quercus cerris | Turkey Oak |
| Quercus cerris x suber = Q. x crenata | Lucombe Oak |
| Quercus coccinea | Scarlet Oak |
| Quercus ilex | Evergreen Oak |
| Quercus imbricaria | Shingle Oak |
| Quercus mas | |
| Quercus palustris | Pin Oak |
| Quercus petraea | Sessile Oak |
| Quercus petraea x robur = Q. x rosacea | |
| Quercus phellos | Willow Oak |
| Quercus phillyreoides | |
| Quercus pubescens | Downy Oak |
| Quercus pyrenaica | Pyrenean Oak |
| Quercus robur | Pedunculate Oak |
| Quercus rubra | Red Oak |
| Quercus suber | Cork Oak |
| Quercus velutina | Black Oak |
| Ramonda myconi | Pyrenean-violet |
| Ranunculus aconitifolius | Aconite-leaved Buttercup |
| Ranunculus acris | Meadow Buttercup |
| Ranunculus aquatilis | Common Water-crowfoot |
| Ranunculus aquatilis x fluitans | |
| Ranunculus aquatilis x peltatus = R. x virzionensis | |
| Ranunculus arvensis | Corn Buttercup |
| Ranunculus auricomus | Goldilocks Buttercup |
| Ranunculus baudotii | Brackish Water-crowfoot |
| Ranunculus baudotii x aquatilis = R. x lambertii | |
| Ranunculus baudotii x peltatus | |
| Ranunculus baudotii x trichophyllus = R. x segretii | |
| Ranunculus bulbosus | Bulbous Buttercup |
| Ranunculus circinatus | Fan-leaved Water-crowfoot |
| Ranunculus cordiger | |
| Ranunculus flammula | Lesser Spearwort |
| Ranunculus flammula ssp. flammula | |
| Ranunculus flammula ssp. minimus | |
| Ranunculus flammula ssp. scoticus | |
| Ranunculus flammula x reptans = R. x levenensis | Loch Leven Spearwort |
| Ranunculus fluitans | River Water-crowfoot |
| Ranunculus fluitans x circinatus | |
| Ranunculus hederaceus | Ivy-leaved Crowfoot |
| Ranunculus lingua | Greater Spearwort |
| Ranunculus marginatus | St. Martin's Buttercup |
| Ranunculus monspeliacus | |
| Ranunculus muricatus | Rough-fruited Buttercup |
| Ranunculus omiophyllus | Round-leaved Crowfoot |
| Ranunculus omiophyllus x peltatus = R. x hiltonii | |
| Ranunculus omiophyllus x tripartitus = R. x novae-forestae | New Forest Crowfoot |
| Ranunculus ophioglossifolius | Adder's-tongue Spearwort |
| Ranunculus paludosus | Jersey Buttercup |
| Ranunculus parviflorus | Small-Flowered Buttercup |
| Ranunculus peltatus | Pond Water-crowfoot |
| Ranunculus peltatus x fluitans = R. x kelchoensis | Kelso Water-crowfoot |
| Ranunculus penicillatus | Stream Water-crowfoot |
| Ranunculus penicillatus ssp. penicillatus | |
| Ranunculus penicillatus ssp. pseudofluitans | |
| Ranunculus pensylvanicus | Bristly Buttercup |
| Ranunculus repens | Creeping Buttercup |
| Ranunculus reptans | Creeping Spearwort |
| Ranunculus rupestris | |
| Ranunculus sardous | Hairy Buttercup |
| Ranunculus sceleratus | Celery-Leaved Buttercup |
| Ranunculus sessiliflorus | |
| Ranunculus trichophyllus | Thread-leaved Water-crowfoot |
| Ranunculus trichophyllus x aquatilis = R. x lutzii | |
| Ranunculus trichophyllus x circinatus | |
| Ranunculus trichophyllus x fluitans = R. x bachii | Wirtgen's Water-crowfoot |
| Ranunculus trichophyllus x peltatus | |
| Ranunculus trilobus | |
| Ranunculus tripartitus | Three-lobed Crowfoot |
| Ranunculus tripartitus x aquatilis | |
| Raphanus raphanistrum | |
| Raphanus raphanistrum ssp. landra | Mediterranean Radish |
| Raphanus raphanistrum ssp. maritimus | Sea Radish |
| Raphanus raphanistrum ssp. raphanistrum | Wild Radish |
| Raphanus raphanistrum x sativus = R. x micranthus | |
| Raphanus sativus | Garden Radish |
| Rapistrum perenne | Steppe Cabbage |
| Rapistrum rugosum | Bastard Cabbage |
| Rapistrum rugosum ssp. linnaeanum | |
| Ratibida columnifera | Prairie Coneflower |
| Reichardia tingitana | |
| Reineckea carnea | Reineckea |
| Reseda alba | White Mignonette |
| Reseda inodora | Scentless Mignonette |
| Reseda lutea | Wild Mignonette |
| Reseda luteola | Weld |
| Reseda odorata | Garden Mignonette |
| Reseda phyteuma | Corn Mignonette |
| Rhagadiolus stellatus | Star Hawkbit |
| Rhamnus alaternus | Mediterranean Buckthorn |
| Rhamnus cathartica | Buckthorn |
| Rhamnus purshiana | Cascara Sagrada |
| Rheum officinale | Tibetan Rhubarb |
| Rheum palmatum | Ornamental Rhubarb |
| Rheum palmatum x rhaponticum = R. x rhabarbarum | Rhubarb |
| Rhinanthus alectorolophus | |
| Rhinanthus angustifolius | Greater Yellow-rattle |
| Rhinanthus minor | Yellow Rattle |
| Rhinanthus minor ssp. borealis | |
| Rhinanthus minor ssp. calcareus | |
| Rhinanthus minor ssp. lintonii | |
| Rhinanthus minor ssp. minor | |
| Rhinanthus minor ssp. monticola | |
| Rhinanthus minor ssp. stenophyllus | |
| Rhodanthe charsleyae | |
| Rhodanthe corymbiflora | |
| Rhodanthe floribunda | Flowery Sunray |
| Rhodanthe manglesii | Pink Sunray |
| Rhodanthe moschata | Musk Sunray |
| Rhododendron arboreum | Tree Rhododendron |
| Rhododendron ferrugineum | Alpenrose |
| Rhododendron luteum | Yellow Azalea |
| Rhododendron macrophyllum | Californian Rosebay |
| Rhododendron minus | |
| Rhododendron ponticum | Rhododendron |
| Rhododendron sutcheunense | |
| Rhus coriaria | Tanner's Sumach |
| Rhus typhina | Stag's-horn Sumach |
| Rhynchospora alba | White Beak-sedge |
| Rhynchospora fusca | Brown Beak-sedge |
| Ribes alpinum | Mountain Currant |
| Ribes americanum | |
| Ribes nigrum | Black Currant |
| Ribes odoratum | Buffalo Currant |
| Ribes rubrum | Red Currant |
| Ribes sanguineum | Flowering Currant |
| Ribes speciosum | Fuchsia-flowered Gooseberry |
| Ribes spicatum | Downy Currant |
| Ribes uva-crispa | Gooseberry |
| Ricinus communis | Castor-oil-plant |
| Ridolfia segetum | False Fennel |
| Robinia pseudoacacia | False Acacia |
| Rodgersia aesculifolia | |
| Rodgersia podophylla | Rodgersia |
| Romulea columnae | Sand Crocus |
| Romulea rosea | Oniongrass |
| Rorippa amphibia | Great Yellow-Cress |
| Rorippa amphibia x austriaca = R. x hungarica | |
| Rorippa austriaca | Austrian Yellow-cress |
| Rorippa islandica | Northern Yellow-cress |
| Rorippa lippizensis | |
| Rorippa nana | |
| Nasturtium officinale | Water-cress |
| Nasturtium officinale x microphylla = N. x sterilis | Hybrid Water-cress |
| Rorippa palustris | Marsh Yellow-Cress |
| Rorippa palustris x amphibia = R. x erythrocaulis | Thames Yellow-cress |
| Rorippa palustris x sylvestris | |
| Rorippa pyrenaica | |
| Rorippa sylvestris | Creeping Yellow-Cress |
| Rorippa sylvestris x amphibia = R. x anceps | Hybrid Yellow-cress |
| Rorippa sylvestris x austriaca = R. x armoracioides | Walthamstow Yellow-cress |
| Rosa 'Hollandica' | Dutch Rose |
| Rosa agrestis | Small-leaved Sweet-briar |
| Rosa arvensis | Field-rose |
| Rosa arvensis x caesia | |
| Rosa arvensis x canina = R. x irregularis | |
| Rosa arvensis x gallica = R. x alba | White Rose |
| Rosa arvensis x micrantha = R. x vituperabilis | |
| Rosa arvensis x obtusifolia = R. x rouyana | |
| Rosa arvensis x rubiginosa = R. x gallicoides | |
| Rosa arvensis x rugosa = R. x paulii | |
| Rosa arvensis x sherardii | |
| Rosa arvensis x stylosa = R. x pseudorusticana | |
| Rosa arvensis x tomentosa | |
| Rosa blanda | Smooth Rose |
| Rosa caesia | |
| Rosa caesia ssp. caesia | Hairy Dog-rose |
| Rosa caesia ssp. vosagiaca | Glaucous Dog-rose |
| Rosa caesia x micrantha = R. x longicolla | |
| Rosa caesia x mollis = R. x glaucoides | |
| Rosa caesia x obtusifolia | |
| Rosa caesia x rubiginosa | |
| Rosa caesia x sherardii | |
| Rosa caesia x tomentosa = R. x cottetii | |
| Rosa canina | Dog-rose |
| Rosa canina agg. | |
| Rosa canina x agrestis = R. x belnensis | |
| Rosa canina x caesia = R. x dumalis | |
| Rosa canina x micrantha = R. x toddiae | |
| Rosa canina x mollis = R. x molletorum | |
| Rosa canina x obtusifolia = R. x dumetorum | |
| Rosa canina x rubiginosa = R. x nitidula | |
| Rosa canina x sherardii = R. x rothschildii | |
| Rosa canina x tomentosa = R. x scabriuscula | |
| Rosa carolina | Pasture Rose |
| Rosa centifolia | Cabbage Rose |
| Rosa chinensis | China Rose |
| Rosa damascena | Damask Rose |
| Rosa davurica | |
| Rosa ferruginea | Red-Leaved Rose |
| Rosa filipes | |
| Rosa foetida | Austrian Briar |
| Rosa gallica | Red Rose |
| Rosa gigantea | |
| Rosa luciae | Memorial Rose |
| Rosa majalis | Cinnamon Rose |
| Rosa micrantha | Small-flowered Sweet-briar |
| Rosa micrantha x agrestis = R. x bishopii | |
| Rosa mollis | Soft Downy-rose |
| Rosa mollis x rubiginosa = R. x molliformis | |
| Rosa multiflora | Many-flowered Rose |
| Rosa noisettiana | Noisette Rose |
| Rosa obtusifolia | Round-leaved Dog-rose |
| Rosa obtusifolia x micrantha | |
| Rosa obtusifolia x rubiginosa = R. x timbalii | |
| Rosa obtusifolia x sherardii | |
| Rosa obtusifolia x tomentosa | |
| Rosa palustris | Swamp Rose |
| Rosa pendulina | Alpine Rose |
| Rosa rubiginosa | Sweet-briar |
| Rosa rubiginosa agg. | |
| Rosa rubiginosa x micrantha = R. x bigeneris | |
| Rosa rugosa | Japanese Rose |
| Rosa rugosa x canina = R. x praegeri | |
| Rosa sempervirens | |
| Rosa sericea | Silky Rose |
| Rosa setigera | Prairie Rose |
| Rosa sherardii | Sherard's Downy-rose |
| Rosa sherardii x agrestis | |
| Rosa sherardii x micrantha | |
| Rosa sherardii x mollis = R. x perthensis | |
| Rosa sherardii x rubiginosa = R. x suberecta | |
| Rosa spinosissima | Burnet Rose |
| Rosa spinosissima x agrestis = R. x caviniacensis | |
| Rosa spinosissima x caesia = R. x margerisonii | |
| Rosa spinosissima x canina = R. x hibernica | |
| Rosa spinosissima x mollis = R. x sabinii | |
| Rosa spinosissima x rubiginosa = R. x biturigensis | |
| Rosa spinosissima x rugosa | |
| Rosa spinosissima x sherardii = R. x involuta | |
| Rosa spinosissima x tomentosa = R. x andrzejowskii | |
| Rosa stylosa | Short-styled Field-rose |
| Rosa stylosa x agrestis | |
| Rosa stylosa x caesia | |
| Rosa stylosa x canina = R. x andegavensis | |
| Rosa stylosa x obtusifolia | |
| Rosa stylosa x rubiginosa = R. x bengyana | |
| Rosa stylosa x sherardii | |
| Rosa tomentosa | Harsh Downy-rose |
| Rosa tomentosa agg. | |
| Rosa tomentosa x agrestis | |
| Rosa tomentosa x micrantha | |
| Rosa tomentosa x mollis | |
| Rosa tomentosa x rubiginosa = R. x avrayensis | |
| Rosa tomentosa x sherardii = R. x suberectiformis | |
| Rosa villosa | Apple Rose |
| Rosa virginiana | Virginian Rose |
| Rosa willmottiae | Miss Willmott's Rose |
| Rosmarinus officinalis | Rosemary |
| Rostraria cristata | Mediterranean Hair-grass |
| Rostraria litorea | |
| Rostraria pumila | |
| Rostraria salzmannii | |
| Rubia peregrina | Wild Madder |
| Rubia tinctorum | Madder |
| Rubus acclivitatum | |
| Rubus accrescens | |
| Rubus acutifrons | |
| Rubus adamsii | |
| Rubus adenanthoides | |
| Rubus adenoleucus | |
| Rubus adscitus | |
| Rubus adspersus | |
| Rubus aequalidens | |
| Rubus aghadergensis | |
| Rubus ahenifolius | |
| Rubus albionis | |
| Rubus allegheniensis | |
| Rubus altiarcuatus | |
| Rubus amplificatus | |
| Rubus andegavensis | |
| Rubus anglobelgicus | |
| Rubus anglocandicans | |
| Rubus anglofuscus | |
| Rubus angloserpens | |
| Rubus angusticuspis | |
| Rubus anisacanthos | |
| Rubus aquarum | |
| Rubus arcticus | Arctic Bramble |
| Rubus ariconiensis | |
| Rubus aristisepalus | |
| Rubus armeniacus | |
| Rubus armipotens | |
| Rubus arrhenii | |
| Rubus arrheniiformis | |
| Rubus asperidens | |
| Rubus atrebatum | |
| Rubus avaloniensis | |
| Rubus averyanus | |
| Rubus babingtonianus | |
| Rubus babingtonii | |
| Rubus bagnallianus | |
| Rubus bakerianus | |
| Rubus bartonii | |
| Rubus bercheriensis | |
| Rubus bertramii | |
| Rubus biloensis | |
| Rubus bloxamianus | |
| Rubus bloxamii | |
| Rubus boraeanus | |
| Rubus botryeros | |
| Rubus boudiccae | |
| Rubus boulayi | |
| Rubus breconensis | |
| Rubus brevistaminosus | |
| Rubus briggsianus | |
| Rubus briggsii | |
| Rubus britannicus | |
| Rubus bucknallii | |
| Rubus caesarius | |
| Rubus caesius | Dewberry |
| Rubus calvatus | |
| Rubus cambrensis | |
| Rubus campaniensis | |
| Rubus canadensis | |
| Rubus cantabrigiensis | |
| Rubus canterburiensis | |
| Rubus cantianus | |
| Rubus cardiophyllus | |
| Rubus carnkiefensis | |
| Rubus castrensis | |
| Rubus cavatifolius | |
| Rubus celticus | |
| Rubus cerdicii | |
| Rubus chamaemorus | Cloudberry |
| Rubus chloophyllus | |
| Rubus chrysoxylon | |
| Rubus cinerosiformis | |
| Rubus cinerosus | |
| Rubus cissburiensis | |
| Rubus clausentinus | |
| Rubus cockburnianus | White-stemmed Bramble |
| Rubus condensatus | |
| Rubus confertiflorus | |
| Rubus conjungens | |
| Rubus conspersus | |
| Rubus coombensis | |
| Rubus corbieri | |
| Rubus cordatifolius | |
| Rubus coreanus | Korean Bramble |
| Rubus cornubiensis | |
| Rubus cotteswoldensis | |
| Rubus couchii | |
| Rubus crespignyanus | |
| Rubus criniger | |
| Rubus crudelis | |
| Rubus cumbrensis | |
| Rubus curvidens | |
| Rubus curvispinosus | |
| Rubus daltrii | |
| Rubus dasycoccus | |
| Rubus dasyphyllus | |
| Rubus daveyi | |
| Rubus decussatus | |
| Rubus deliciosus | Rocky Mountain Raspberry |
| Rubus dentatifolius | |
| Rubus devoniensis | |
| Rubus distractiformis | |
| Rubus divaricatus | |
| Rubus diversiarmatus | |
| Rubus diversus | |
| Rubus dobuniensis | |
| Rubus drejeri | |
| Rubus dumnoniensis | |
| Rubus dunensis | |
| Rubus durescens | |
| Rubus durotrigum | |
| Rubus eboracensis | |
| Rubus ebudensis | |
| Rubus echinatoides | |
| Rubus echinatus | |
| Rubus edeesii | |
| Rubus effrenatus | |
| Rubus egregius | |
| Rubus elegantispinosus | |
| Rubus errabundus | |
| Rubus erythrops | |
| Rubus euanthinus | |
| Rubus euryanthemus | |
| Rubus fissus | |
| Rubus flexuosus | |
| Rubus formidabilis | |
| Rubus fruticosus agg. | |
| Rubus furnarius | |
| Rubus furvicolor | |
| Rubus fuscicaulis | |
| Rubus fuscicortex | |
| Rubus fuscoviridis | |
| Rubus fuscus | |
| Rubus gallofuscus | |
| Rubus gariannensis | |
| Rubus glanduliger | |
| Rubus glareosus | |
| Rubus gratus | |
| Rubus griffithianus | |
| Rubus halsteadensis | |
| Rubus hantonensis | |
| Rubus hartmanii | |
| Rubus hastiformis | |
| Rubus hebridensis | |
| Rubus herefordensis | |
| Rubus hesperius | |
| Rubus heterobelus | |
| Rubus hibernicus | |
| Rubus hindii | |
| Rubus hirsutissimus | |
| Rubus hylocharis | |
| Rubus hylonomus | |
| Rubus hylophilus | |
| Rubus hyposericeus | |
| Rubus iceniensis | |
| Rubus idaeus | Raspberry |
| Rubus idaeus x caesius = R. x pseudoidaeus | |
| Rubus idaeus x fruticosus | |
| Rubus idaeus x phoenicolasius = R. x paxii | |
| Rubus illecebrosus | Strawberry-raspberry |
| Rubus imbricatus | |
| Rubus incurvatiformis | |
| Rubus incurvatus | |
| Rubus infestior | |
| Rubus infestisepalus | |
| Rubus infestus | |
| Rubus informifolius | |
| Rubus insectifolius | |
| Rubus integribasis | |
| Rubus intensior | |
| Rubus iodnephes | |
| Rubus iricus | |
| Rubus iscanus | |
| Rubus laciniatus | |
| Rubus lacustris | |
| Rubus lamburnensis | |
| Rubus lanaticaulis | |
| Rubus largificus | |
| Rubus lasiodermis | |
| Rubus latifolius | |
| Rubus laxatifrons | |
| Rubus leightonii | |
| Rubus lentiginosus | |
| Rubus leptadenes | |
| Rubus leptothyrsos | |
| Rubus lettii | |
| Rubus leucandriformis | |
| Rubus leucostachys | |
| Rubus leyanus | |
| Rubus lindebergii | |
| Rubus lindleianus | |
| Rubus linkianus | |
| Rubus lintonii | |
| Rubus loganobaccus | Loganberry |
| Rubus londinensis | |
| Rubus longifrons | |
| Rubus longithyrsiger | |
| Rubus longus | |
| Rubus ludensis | |
| Rubus macrophyllus | |
| Rubus malvernicus | |
| Rubus marshallii | |
| Rubus melanocladus | |
| Rubus melanodermis | |
| Rubus mercicus | |
| Rubus merlinii | |
| Rubus metallorum | |
| Rubus micans | |
| Rubus milesianus | |
| Rubus milfordensis | |
| Rubus mollissimus | |
| Rubus monensis | |
| Rubus morganwgensis | |
| Rubus moylei | |
| Rubus mucronatiformis | |
| Rubus mucronatoides | |
| Rubus mucronulatus | |
| Rubus murrayi | |
| Rubus naldrettii | |
| Rubus nemoralis | |
| Rubus nemorosus | |
| Rubus neomalacus | |
| Rubus nessensis | |
| Rubus neumannianus | |
| Rubus newbouldianus | |
| Rubus newbouldii | |
| Rubus newbridgensis | |
| Rubus newtonii | |
| Rubus nitidiformis | |
| Rubus nobilissimus | |
| Rubus norvicensis | |
| Rubus obesifolius | |
| Rubus obscuriflorus | |
| Rubus odoratus | Purple-flowered Raspberry |
| Rubus odoratus x parviflorus = R. x fraseri | |
| Rubus orbus | |
| Rubus ordovicum | |
| Rubus oxyanchus | |
| Rubus painteri | |
| Rubus pallidisetus | |
| Rubus pallidus | |
| Rubus pampinosus | |
| Rubus pannosus | |
| Rubus parviflorus | Thimbleberry |
| Rubus pascuorum | |
| Rubus patuliformis | |
| Rubus pedemontanus | |
| Rubus peninsulae | |
| Rubus percrispus | |
| Rubus perdigitatus | |
| Rubus permundus | |
| Rubus pervalidus | |
| Rubus phaeocarpus | |
| Rubus phoenicolasius | Japanese Wineberry |
| Rubus pictorum | |
| Rubus pistoris | |
| Rubus platyacanthus | |
| Rubus plicatus | |
| Rubus pliocenicus | |
| Rubus plymensis | |
| Rubus poliodes | |
| Rubus polyanthemus | |
| Rubus polyoplus | |
| Rubus porphyrocaulis | |
| Rubus powellii | |
| Rubus praetextus | |
| Rubus proiectus | |
| Rubus prolongatus | |
| Rubus pruinosus | |
| Rubus pseudoplinthostylus | |
| Rubus pullifolius | |
| Rubus purbeckensis | |
| Rubus purchasianus | |
| Rubus putneiensis | |
| Rubus pydarensiformis | |
| Rubus pydarensis | |
| Rubus pyramidalis | |
| Rubus questieri | |
| Rubus radula | |
| Rubus radulicaulis | |
| Rubus raduloides | |
| Rubus ramosus | |
| Rubus regillus | |
| Rubus rhombifolius | |
| Rubus riddelsdellii | |
| Rubus rilstonei | |
| Rubus riparius | |
| Rubus robiae | |
| Rubus rossensis | |
| Rubus rotundifolius | |
| Rubus rubriflorus | |
| Rubus rubristylus | |
| Rubus rubritinctus | |
| Rubus rudis | |
| Rubus rufescens | |
| Rubus sagittarius | |
| Rubus salteri | |
| Rubus saxatilis | Stone Bramble |
| Rubus scaber | |
| Rubus scabripes | |
| Rubus sciocharis | |
| Rubus scissus | |
| Rubus scoticus | |
| Rubus sectiramus | |
| Rubus segontii | |
| Rubus semiglaber | |
| Rubus sempernitens | |
| Rubus septentrionalis | |
| Rubus silurum | |
| Rubus silvaticus | |
| Rubus sneydii | |
| Rubus spadix | |
| Rubus spectabilis | Salmonberry |
| Rubus sprengelii | |
| Rubus stanneus | |
| Rubus stenopetalus | |
| Rubus subinermoides | |
| Rubus subintegribasis | |
| Rubus subopacus | |
| Rubus subtercanens | |
| Rubus sulcatus | |
| Rubus surrejanus | |
| Rubus tamarensis | |
| Rubus tardus | |
| Rubus tavensis | |
| Rubus tenuiarmatus | |
| Rubus thurstonii | |
| Rubus thyrsigeriformis | |
| Rubus trelleckensis | |
| Rubus tresidderi | |
| Rubus triangularis | |
| Rubus trichodes | |
| Rubus tricolor | Chinese Bramble |
| Rubus trinovantium | |
| Rubus troiensis | |
| Rubus tuberculatus | |
| Rubus tumulorum | |
| Rubus turneri | |
| Rubus turritus | |
| Rubus ulmifolius | |
| Rubus ulmifolius x caesius | |
| Rubus vagensis | |
| Rubus varvicensis | |
| Rubus venetorum | |
| Rubus vestitus | |
| Rubus vigorosus | |
| Rubus vigursii | |
| Rubus villicauliformis | |
| Rubus villosior | |
| Rubus vindomensis | |
| Rubus viridescens | |
| Rubus waddellii | |
| Rubus warrenii | |
| Rubus watsonii | |
| Rubus wedgwoodiae | |
| Rubus winteri | |
| Rubus wirralensis | |
| Rubus wolley-dodii | |
| Rudbeckia amplexicaulis | Clasping-leaved Coneflower |
| Rudbeckia fulgida | Perennial Coneflower |
| Rudbeckia hirta | Black-Eyed-Susan |
| Rudbeckia laciniata | Coneflower |
| Rudbeckia triloba | Thin-leaved Coneflower |
| Rumex acetosa | |
| Rumex acetosa ssp. acetosa | Common Sorrel |
| Rumex acetosa ssp. ambiguus | Garden Sorrel |
| Rumex acetosa ssp. biformis | Overlooked Sorrel |
| Rumex acetosa ssp. hibernicus | Irish Sorrel |
| Rumex acetosella | Sheep's Sorrel |
| Rumex acetosella ssp. acetosella | |
| Rumex acetosella ssp. pyrenaicus | |
| Rumex alpinus | Monk's-rhubarb |
| Rumex altissimus | |
| Rumex aquaticus | Scottish Dock |
| Rumex aquaticus x crispus = R. x conspersus | |
| Rumex aquaticus x obtusifolius = R. x platyphyllus | |
| Rumex aquaticus x sanguineus = R. x dumulosus | |
| Rumex bequaertii | |
| Rumex brownii | Hooked Dock |
| Rumex bucephalophorus | Horned Dock |
| Rumex confertus | Russian Dock |
| Rumex confertus x crispus = R. x skofitzii | |
| Rumex confertus x obtusifolius = R. x borbasii | |
| Rumex conglomeratus | Clustered Dock |
| Rumex conglomeratus x maritimus = R. x knafii | |
| Rumex conglomeratus x obtusifolius = R. x abortivus | |
| Rumex conglomeratus x palustris = R. x wirtgenii | |
| Rumex conglomeratus x pulcher = R. x muretii | |
| Rumex conglomeratus x rupestris = R. x rosemurphyae | |
| Rumex conglomeratus x sanguineus = R. x ruhmeri | |
| Rumex crispus | Curled Dock |
| Rumex crispus ssp. crispus | |
| Rumex crispus ssp. littoreus | |
| Rumex crispus ssp. uliginosus | |
| Rumex crispus x conglomeratus = R. x schulzei | |
| Rumex crispus x maritimus = R. x fallacinus | |
| Rumex crispus x obtusifolius = R. x pratensis | |
| Rumex crispus x palustris = R. x heteranthos | |
| Rumex crispus x pulcher = R. x pseudopulcher | |
| Rumex crispus x rupestris | |
| Rumex crispus x sanguineus = R. x sagorskii | |
| Rumex cristatus | Greek Dock |
| Rumex cristatus x conglomeratus | |
| Rumex cristatus x crispus = R. x dimidiatus | |
| Rumex cristatus x obtusifolius = R. x lousleyi | |
| Rumex cristatus x palustris = R. x akeroydii | |
| Rumex cristatus x patientia = R. x xenogenus | |
| Rumex crystallinus | Glistening Dock |
| Rumex dentatus | Aegean Dock |
| Rumex dentatus ssp. halacsyi | |
| Rumex frutescens | Argentine Dock |
| Rumex frutescens x conglomeratus = R. x wrightii | |
| Rumex frutescens x obtusifolius = R. x cornubiensis | |
| Rumex hydrolapathum | Water Dock |
| Rumex hydrolapathum x conglomeratus = R. x digeneus | |
| Rumex hydrolapathum x crispus = R. x schreberi | |
| Rumex hydrolapathum x obtusifolius = R. x weberi | |
| Rumex longifolius | Northern Dock |
| Rumex longifolius x crispus = R. x propinquus | |
| Rumex longifolius x obtusifolius = R. x hybridus | |
| Rumex maritimus | Golden Dock |
| Rumex nepalensis | |
| Rumex obovatus | Obovate-leaved Dock |
| Rumex obtusifolius | Broad-leaved Dock |
| Rumex obtusifolius x maritimus = R. x callianthemus | |
| Rumex obtusifolius x palustris = R. x steinii | |
| Rumex palustris | Marsh Dock |
| Rumex palustris x maritimus = R. x henrardii | |
| Rumex patientia | Patience Dock |
| Rumex patientia ssp. orientalis | |
| Rumex patientia x conglomeratus | |
| Rumex patientia x crispus = R. x confusus | |
| Rumex patientia x obtusifolius = R. x erubescens | |
| Rumex pseudonatronatus | |
| Rumex pulcher | Fiddle Dock |
| Rumex pulcher ssp. anodontus | |
| Rumex pulcher ssp. divaricatus | |
| Rumex pulcher ssp. pulcher | |
| Rumex pulcher x obtusifolius = R. x ogulinensis | |
| Rumex rupestris | Shore Dock |
| Rumex rupestris x pulcher = R. x trimenii | |
| Rumex salicifolius | Willow-leaved Dock |
| Rumex sanguineus | |
| Rumex sanguineus x obtusifolius = R. x dufftii | |
| Rumex sanguineus x pulcher = R. x mixtus | |
| Rumex scutatus | French Sorrel |
| Rumex stenophyllus | |
| Rumex steudelii | |
| Rumex tenax | |
| Rumex thyrsiflorus | |
| Ruppia cirrhosa | Spiral Tasselweed |
| Ruppia maritima | Beaked Tasselweed |
| Ruschia caroli | Shrubby Dewplant |
| Ruscus aculeatus | Butcher's Broom |
| Ruscus hypoglossum | Spineless Butcher's-broom |
| Ruta graveolens | Rue |
| Ruta montana | |
| Rytidosperma caespitosum | |
| Rytidosperma nudum | |
| Rytidosperma penicillatum | |
| Rytidosperma pilosum | |
| Rytidosperma racemosum | Wallaby-grass |
| Rytidosperma semiannulare | |
| Rytidosperma setaceum | |
| Rytidosperma thomsonii | |
| Sagina apetala ssp. apetala | |
| Sagina apetala ssp. erecta | |
| Sagina filicaulis | Annual Pearlwort |
| Sagina maritima | Sea Pearlwort |
| Sagina nivalis | Snow Pearlwort |
| Sagina nodosa | Knotted Pearlwort |
| Sagina procumbens | Procumbent Pearlwort |
| Sagina saginoides | Alpine Pearlwort |
| Sagina saginoides x procumbens = S. x normaniana | Scottish Pearlwort |
| Sagina subulata | Heath Pearlwort |
| Sagina subulata x procumbens = S. x micrantha | |
| Sagittaria graminea | Grass-leaved Arrowhead |
| Sagittaria latifolia | Duck-potato |
| Sagittaria rigida | Canadian Arrowhead |
| Sagittaria sagittifolia | Arrowhead |
| Sagittaria subulata | Narrow-leaved Arrowhead |
| Salicornia dolichostachya | Long-Spiked Glasswort |
| Salicornia emerici | Shiny Glasswort |
| Salicornia europaea | Common Glasswort |
| Salicornia europaea agg. | |
| Salicornia fragilis | Yellow Glasswort |
| Salicornia obscura | Glaucous Glasswort |
| Salicornia procumbens agg. | |
| Salicornia pusilla | One-flowered Glasswort |
| Salicornia pusilla x ramosissima | |
| Salicornia ramosissima | Purple Glasswort |
| Salix acutifolia | Siberian Violet-willow |
| Salix alba | White Willow |
| Salix alba x babylonica = S. x sepulcralis | Weeping Willow |
| Salix arbuscula | Mountain Willow |
| Salix arbuscula x herbacea = S. x simulatrix | |
| Salix arbuscula x reticulata = S. x ganderi | |
| Salix aurita | Eared Willow |
| Salix aurita x herbacea = S. x margarita | |
| Salix aurita x lapponum = S. x obtusifolia | |
| Salix aurita x lapponum x herbacea | |
| Salix aurita x myrsinifolia = S. x coriacea | |
| Salix aurita x myrsinifolia x phylicifolia = S. x saxetana | |
| Salix aurita x phylicifolia = S. x ludificans | |
| Salix aurita x repens = S. x ambigua | |
| Salix aurita x repens x herbacea = S. x grahamii | |
| Salix babylonica | |
| Salix candida | |
| Salix caprea | Goat Willow |
| Salix caprea ssp. caprea | |
| Salix caprea ssp. sphacelata | |
| Salix caprea x aurita = S. x capreola | |
| Salix caprea x cinerea = S. x reichardtii | |
| Salix caprea x cinerea x repens | |
| Salix caprea x elaeagnos = S. x seringeana | |
| Salix caprea x lapponum = S. x canescens | |
| Salix caprea x myrsinifolia = S. x latifolia | |
| Salix caprea x myrsinifolia x phylicifolia | |
| Salix caprea x phylicifolia | |
| Salix caprea x repens = S. x laschiana | |
| Salix cinerea | |
| Salix cinerea ssp. cinerea | Grey Willow |
| Salix cinerea ssp. oleifolia | Rusty Willow |
| Salix cinerea x aurita = S. x multinervis | |
| Salix cinerea x aurita x myrsinifolia = S. x forbesiana | |
| Salix cinerea x myrsinifolia = S. x strepida | |
| Salix cinerea x myrsinifolia x phylicifolia | |
| Salix cinerea x phylicifolia = S. x laurina | Laurel-leaved Willow |
| Salix cinerea x repens = S. x subsericea | |
| Salix daphnoides | European Violet-willow |
| Salix discolor | Glaucous Willow |
| Salix elaeagnos | Olive Willow |
| Salix eriocephala | Heart-leaved Willow |
| Salix fragilis | Crack-willow |
| Salix fragilis x alba = S. x rubens | Hybrid Crack-willow |
| Salix fragilis x babylonica = S. x pendulina | Weeping Crack-willow |
| Salix fragilis x triandra = S. x alopecuroides | |
| Salix herbacea | Dwarf Willow |
| Salix hookeriana | |
| Salix irrorata | Blue-stem Willow |
| Salix lanata | Woolly Willow |
| Salix lanata x herbacea = S. x sadleri | |
| Salix lapponum | Downy Willow |
| Salix lapponum x arbuscula = S. x pseudoglauca | |
| Salix lapponum x herbacea = S. x sobrina | |
| Salix lapponum x lanata | |
| Salix lucida | Shining Willow |
| Salix microstachya | |
| Salix myrsinifolia | Dark-leaved Willow |
| Salix myrsinifolia x arbuscula | |
| Salix myrsinifolia x lapponum | |
| Salix myrsinifolia x myrsinites = S. x punctata | |
| Salix myrsinifolia x phylicifolia = S. x tetrapla | |
| Salix myrsinifolia x phylicifolia x myrsinites = S. x blyttiana | |
| Salix myrsinifolia x phylicifolia x repens | |
| Salix myrsinifolia x repens = S. x felina | |
| Salix myrsinites | Whortle-leaved Willow |
| Salix myrsinites x herbacea | |
| Salix pentandra | Bay Willow |
| Salix pentandra x alba = S. x ehrhartiana | Ehrhart's Willow |
| Salix pentandra x fragilis = S. x meyeriana | Shiny-leaved Willow |
| Salix petiolaris | Slender Willow |
| Salix phylicifolia | Tea-leaved Willow |
| Salix phylicifolia x repens | |
| Salix purpurea | Purple Willow |
| Salix purpurea x aurita = S. x dichroa | |
| Salix purpurea x aurita x phylicifolia = S. x sesquitertia | |
| Salix purpurea x cinerea = S. x pontederiana | |
| Salix purpurea x cinerea x aurita = S. x confinis | |
| Salix purpurea x myrsinifolia = S. x beckiana | |
| Salix purpurea x phylicifolia = S. x secerneta | |
| Salix purpurea x repens = S. x doniana | |
| Salix purpurea x viminalis = S. x rubra | Green-leaved Willow |
| Salix purpurea x viminalis x caprea x cinerea = S. x taylorii | |
| Salix purpurea x viminalis x cinerea = S. x forbyana | Fine Osier |
| Salix repens | Creeping Willow |
| Salix repens x arbuscula | |
| Salix repens x herbacea = S. x cernua | |
| Salix repens x lapponum | |
| Salix reticulata | Net-leaved Willow |
| Salix schraderiana | |
| Salix triandra | Almond Willow |
| Salix triandra x purpurea | |
| Salix triandra x viminalis = S. x mollissima | Sharp-stipuled Willow |
| Salix udensis | Sachalin Willow |
| Salix viminalis | Osier |
| Salix viminalis x aurita = S. x fruticosa | Shrubby Osier |
| Salix viminalis x caprea = S. x smithiana | Broad-leaved Osier |
| Salix viminalis x caprea x aurita = S. x stipularis | Eared Osier |
| Salix viminalis x caprea x cinerea = S. x calodendron | Holme Willow |
| Salix viminalis x cinerea = S. x holosericea | Silky-leaved Osier |
| Salix viminalis x cinerea x aurita = S. x hirtei | |
| Salix viminalis x cinerea x repens = S. x angusensis | |
| Salix viminalis x myrsinifolia = S. x seminigricans | |
| Salix viminalis x repens = S. x friesiana | |
| Salpichroa origanifolia | Cock's-Eggs |
| Salpiglossis sinuata | Painted-tongue |
| Salsola collina | |
| Salsola kali | |
| Salsola kali ssp. tragus | Spineless Saltwort |
| Salsola kali ssp. kali | Prickly Saltwort |
| Salsola kali ssp. tragus | |
| Salsola soda | |
| Salvia aethiopis | African Sage |
| Salvia argentea | Silver Sage |
| Salvia barrelieri | |
| Salvia bornmuelleri | |
| Salvia glutinosa | Sticky Clary |
| Salvia nemorosa | Balkan Clary |
| Salvia officinalis | Sage |
| Salvia pratensis | Meadow Clary |
| Salvia pratensis x nemorosa = S. x sylvestris | Hybrid Clary |
| Salvia reflexa | Mintweed |
| Salvia sclarea | Clary |
| Salvia splendens | Scarlet Sage |
| Salvia verbenaca | Wild Clary |
| Salvia verticillata | Whorled Clary |
| Salvia villicaulis | |
| Salvia virgata | |
| Salvia viridis | Annual Clary |
| Salvia x andrzejowskii | |
| Sambucus canadensis | American Elder |
| Sambucus ebulus | Dwarf Elder |
| Sambucus nigra | Elder |
| Sambucus racemosa | Red-berried Elder |
| Samolus valerandi | Brookweed |
| Sanguisorba canadensis | White Burnet |
| Sanguisorba officinalis | Great Burnet |
| Sanicula europaea | Sanicle |
| Santolina chamaecyparissus | Lavender-cotton |
| Santolina rosmarinifolia | Holy-flax |
| Sanvitalia procumbens | |
| Saponaria calabrica | |
| Saponaria glutinosa | |
| Saponaria ocymoides | Rock Soapwort |
| Saponaria officinalis | Soapwort |
| Saponaria orientalis | |
| Sarcococca confusa | |
| Sarcococca hookeriana | |
| Sarcocornia perennis | Perennial Glasswort |
| Sarracenia flava | Trumpets |
| Sarracenia leucophylla | Purple Trumpet-leaf |
| Sarracenia purpurea | Pitcherplant |
| Sasa palmata | Broad-leaved Bamboo |
| Sasa veitchii | Veitch's Bamboo |
| Sasaella ramosa | Hairy Bamboo |
| Satureja hortensis | Summer Savory |
| Satureja montana | Winter Savory |
| Saussurea alpina | Alpine Saw-wort |
| Saussurea discolor | Heart-leaved Saussurea |
| Saxifraga aizoides | Yellow Saxifrage |
| Saxifraga cernua | Drooping Saxifrage |
| Saxifraga cespitosa | Tufted Saxifrage |
| Saxifraga cuneifolia | Lesser Londonpride |
| Saxifraga cymbalaria | Celandine Saxifrage |
| Saxifraga granulata | Meadow Saxifrage |
| Saxifraga hirculus | Marsh Saxifrage |
| Saxifraga hirsuta | Kidney Saxifrage |
| Saxifraga hypnoides | Mossy Saxifrage |
| Saxifraga hypnoides x rosacea | |
| Saxifraga hypnoides x tridactylites | |
| Saxifraga nivalis | Alpine Saxifrage |
| Saxifraga oppositifolia | Purple Saxifrage |
| Saxifraga paniculata | Livelong Saxifrage |
| Saxifraga rivularis | Highland Saxifrage |
| Saxifraga rosacea | Irish Saxifrage |
| Saxifraga rosacea ssp. hartii | |
| Saxifraga rosacea ssp. rosacea | |
| Saxifraga rotundifolia | Round-leaved Saxifrage |
| Saxifraga spathularis | St Patrick's-cabbage |
| Saxifraga spathularis x hirsuta = S. x polita | False Londonpride |
| Saxifraga stellaris | Starry Saxifrage |
| Saxifraga stolonifera | Strawberry Saxifrage |
| Saxifraga tridactylites | Rue-Leaved Saxifrage |
| Saxifraga trifurcata | |
| Saxifraga umbrosa | Pyrenean Saxifrage |
| Saxifraga umbrosa x hirsuta = S. x geum | Scarce Londonpride |
| Saxifraga umbrosa x spathularis = S. x urbium | Londonpride |
| Saxifraga x arendsii | |
| Saxifraga x geum x paniculata = S. x andrewsii | |
| Scabiosa atropurpurea | Sweet Scabious |
| Scabiosa canescens | |
| Scabiosa caucasica | Pincushion-flower |
| Scabiosa columbaria | Small Scabious |
| Scabiosa ochroleuca | |
| Scabiosa prolifera | |
| Scabiosa tricuspidata | |
| Scandix australis | |
| Scandix iberica | |
| Scandix pecten-veneris | Shepherd's Needle |
| Scandix stellata | |
| Schedonnardus paniculatus | |
| Schedonorus arundinaceus | Tall Fescue |
| Schedonorus giganteus | Giant Fescue |
| Schedonorus giganteus x Lolium perenne = X Festulolium brinkmannii | |
| Schedonorus pratensis | Meadow Fescue |
| Schedonorus pratensis x arundinaceus = F. x aschersoniana | |
| Schedonorus pratensis x giganteus = F. x schlickumii | |
| Schedonorus pratensis x Lolium multiflorum = X Schedolium braunii | |
| Schedonorus pratensis x Lolium perenne = X Schedolium loliaceum | Hybrid Fescue |
| Scheuchzeria palustris | Rannoch-rush |
| Schismus arabicus | |
| Schismus barbatus | Kelch-grass |
| Schizanthus grahamii x pinnatus = S. x wisetonensis | |
| Schizanthus pinnatus | Poor-man's-orchid |
| Schizostylis coccinea | Kaffir Lily |
| Schkuhria pinnata | Dwarf Marigold |
| Schmidtia kalihariensis | |
| Schoenoplectus lacustris | Common Club-rush |
| Schoenoplectus lacustris x triqueter = S. x carinatus | |
| Schoenoplectus pungens | Sharp Club-rush |
| Schoenoplectus tabernaemontani | Grey Club-rush |
| Schoenoplectus tabernaemontani x triqueter = S. x kuekenthalianus | |
| Schoenoplectus triqueter | Triangular Club-rush |
| Schoenus ferrugineus | Brown Bog-rush |
| Schoenus nigricans | Black Bog-Rush |
| Sciadopitys verticullata | Umbrella-pine |
| Scilla autumnalis | Autumn Squill |
| Scilla bifolia | Alpine Squill |
| Scilla bithynica | Turkish Squill |
| Scilla forbesii | Glory-of-the-Snow |
| Scilla liliohyacinthus | Pyrenean Squill |
| Scilla messeniaca | Greek Squill |
| Scilla peruviana | Portuguese Squill |
| Scilla puschkinioides | Russian Squill |
| Scilla siberica | Siberian Squill |
| Scilla verna | Spring Squill |
| Scirpoides holoschoenus | Round-headed Club-rush |
| Scirpus inundatus | Swamp Club-rush |
| Scirpus nodosus | Knotted Club-rush |
| Scirpus sylvaticus | Wood Club-rush |
| Scleranthus annuus | Annual Knawel |
| Scleranthus annuus ssp. annuus | |
| Scleranthus annuus ssp. polycarpos | |
| Scleranthus perennis | Perennial Knawel |
| Scleranthus perennis ssp. perennis | |
| Scleranthus perennis ssp. prostratus | |
| Scleria bracteata | |
| Sclerochloa dura | |
| Sclerolaena anisacanthoides | |
| Sclerolaena birchii | Galvanized Bur |
| Sclerolaena divaricata | Tangled Bassia |
| Sclerolaena muricata | Five-spined Bassia |
| Scolymus grandiflorus | |
| Scolymus hispanicus | Golden Thistle |
| Scolymus maculatus | |
| Scopolia carniolica | Scopolia |
| Scorpiurus muricatus | Caterpillar-plant |
| Scorpiurus vermiculatus | |
| Scorzonera hispanica | Scorzonera |
| Scorzonera humilis | Viper's-Grass |
| Scorzoneroides autumnalis | Autumn Hawkbit |
| Scorzoneroides autumnalis ssp. autumnalis | |
| Scorzoneroides autumnalis ssp. pratensis | |
| Scrophularia auriculata | Water Figwort |
| Scrophularia canina | French Figwort |
| Scrophularia nodosa | Common Figwort |
| Scrophularia peregrina | Nettle-leaved Figwort |
| Scrophularia scopolii | Italian Figwort |
| Scrophularia scorodonia | Balm-leaved Figwort |
| Scrophularia umbrosa | Green Figwort |
| Scrophularia vernalis | Yellow Figwort |
| Scutellaria altissima | Somerset Skullcap |
| Scutellaria galericulata | Skullcap |
| Scutellaria galericulata x minor = S. x hybrida | |
| Scutellaria hastifolia | Norfolk Skullcap |
| Scutellaria minor | Lesser Skullcap |
| Secale cereale | Rye |
| Secale montanum | |
| Securigera cretica | |
| Securigera securidaca | Hatchet Vetch |
| Securigera varia | Crown Vetch |
| Sedum acre | Biting Stonecrop |
| Sedum album | White Stonecrop |
| Sedum anacampseros | Love-restoring Stonecrop |
| Sedum anglicum | English Stonecrop |
| Sedum cepaea | Pink Stonecrop |
| Sedum confusum | Lesser Mexican-stonecrop |
| Sedum dasyphyllum | Thick-Leaved Stonecrop |
| Sedum forsterianum | Rock Stonecrop |
| Sedum hispanicum | Spanish Stonecrop |
| Sedum hybridum | Siberian Stonecrop |
| Sedum kamtschaticum | Kamchatka Stonecrop |
| Sedum lydium | Least Stonecrop |
| Sedum mexicanum | Mexican-stonecrop |
| Sedum nicaeense | Pale Stonecrop |
| Sedum pallidum | |
| Sedum populifolium | |
| Sedum praealtum | Greater Mexican-stonecrop |
| Sedum rosea | Roseroot |
| Sedum rubrotinctum | Jelly-beans |
| Sedum rupestre | Reflexed Stonecrop |
| Sedum sexangulare | Tasteless Stonecrop |
| Sedum sieboldii | |
| Sedum spathulifolium | Colorado Stonecrop |
| Sedum spectabile | Butterfly Stonecrop |
| Sedum spectabile x telephium = S. 'Herbstfreude' | Autumn Stonecrop |
| Sedum spurium | Caucasian Stonecrop |
| Sedum stellatum | Starry Stonecrop |
| Sedum stoloniferum | Lesser Caucasian-stonecrop |
| Sedum telephium | Orpine |
| Sedum telephium ssp. fabaria | |
| Sedum telephium ssp. maximum | |
| Sedum telephium ssp. telephium | |
| Sedum villosum | Hairy Stonecrop |
| Seidelia mercurialis | |
| Selaginella kraussiana | Krauss's Clubmoss |
| Selaginella selaginoides | Lesser Clubmoss |
| Selago corymbosa | |
| Selinum carvifolia | Cambridge Milk-parsley |
| Semiarundinaria fastuosa | Narihira Bamboo |
| Sempervivum andreanum | |
| Sempervivum arachnoideum | Cobweb House-leek |
| Sempervivum montanum | Mountain House-leek |
| Sempervivum tectorum | Houseleek |
| Senecio aegyptius | |
| Senecio aquaticus | Marsh Ragwort |
| Senecio arenarius | |
| Senecio bipinnatisectus | Australian Fireweed |
| Senecio brasiliensis | |
| Senecio cambrensis | Welsh Groundsel |
| Senecio caracasanus | |
| Senecio cineraria | Silver Ragwort |
| Senecio cineraria x erucifolius = S. x thuretii | |
| Senecio cineraria x jacobaea = S. x albescens | |
| Senecio doria | Golden Ragwort |
| Senecio doronicum | Chamois Ragwort |
| Senecio eboracensis | |
| Senecio elegans | Purple Groundsel |
| Senecio erucifolius | Hoary Ragwort |
| Senecio gallicus | French Groundsel |
| Senecio glastifolius | Woad-leaved Ragwort |
| Senecio glomeratus | Annual Fireweed |
| Senecio glossanthus | Slender Groundsel |
| Senecio grandiflorus | Purple Ragwort |
| Senecio hieracioides | |
| Senecio inaequidens | Narrow-Leaved Ragwort |
| Senecio jacobaea | Common Ragwort |
| Senecio jacobaea x aquaticus = S. x ostenfeldii | |
| Senecio juniperinus | |
| Senecio leucanthemifolius | |
| Senecio linearifolius | Fireweed Groundsel |
| Senecio minimus | Toothed Fireweed |
| Senecio nudiusculus | |
| Senecio oederiifolius | |
| Senecio ovatus | Wood Ragwort |
| Senecio paludosus | Fen Ragwort |
| Senecio pinnulatus | |
| Senecio pterophorus | Shoddy Ragwort |
| Senecio quadridentatus | Cotton Fireweed |
| Senecio sarracenicus | Broad-Leaved Ragwort |
| Senecio smithii | Magellan Ragwort |
| Senecio squalidus | Oxford Ragwort |
| Senecio squalidus x viscosus = S. x subnebrodensis | |
| Senecio squalidus x vulgaris = S. x baxteri | |
| Senecio sylvaticus | Heath Groundsel |
| Senecio sylvaticus x viscosus = S. x viscidulus | |
| Senecio vernalis | Eastern Groundsel |
| Senecio viscosus | Sticky Groundsel |
| Senecio vulgaris | Groundsel |
| Senecio vulgaris x vernalis = S. x helwingii | |
| Senna obtusifolia | American Sicklepod |
| Senna occidentalis | Coffee Senna |
| Sequoia sempervirens | Coastal Redwood |
| Sequoiadendron giganteum | Wellingtonia |
| Serapias lingua | Tongue-Orchid |
| Serapias neglecta | Scarce Tongue-orchid |
| Serapias parviflora | Small-flowered Tongue-orchid |
| Seriphidium compactum | |
| Serratula tinctoria | Saw-Wort |
| Sesamum orientale | Sesame |
| Sesbania benthamiana | |
| Sesbania bispinosa | |
| Sesbania exaltata | Colorado River-hemp |
| Seseli libanotis | Moon Carrot |
| Sesleria caerulea | Blue Moor-Grass |
| Setaria adhaerens | Adherent Bristle-grass |
| Setaria dielsii | |
| Setaria faberi | Nodding Bristle-grass |
| Setaria italica | Foxtail Bristle-grass |
| Setaria parviflora | Knotroot Bristle-grass |
| Setaria pumila | Yellow Bristle-grass |
| Setaria verticillata | Rough Bristle-grass |
| Setaria viridis | Green Bristle-grass |
| Setaria vulpiseta | |
| Sherardia arvensis | Field Madder |
| Sibbaldia procumbens | Sibbaldia |
| Sibthorpia europaea | Cornish Moneywort |
| Sicyos angulatus | Bur Cucumber |
| Sida cordifolia | Flannel Weed |
| Sida glomerata | |
| Sida rhombifolia | Queensland-hemp |
| Sida spinosa | Prickly Mallow |
| Sidalcea candida | Prairie Mallow |
| Sidalcea malviflora | Greek Mallow |
| Sideritis hyssopifolia | |
| Sideritis lanata | |
| Sideritis montana | Mountain Ironwort |
| Sideritis romana | |
| Sigesbeckia microcephala | Pale Indian-weed |
| Sigesbeckia orientalis | Eastern St Paul's-wort |
| Sigesbeckia serrata | Western St Paul's-wort |
| Silaum silaus | Pepper-saxifrage |
| Silene acaulis | Moss Campion |
| Silene antirrhina | Sleepy Catchfly |
| Silene apetala | |
| Silene armeria | Sweet-William Catchfly |
| Silene behen | |
| Silene bellidifolia | |
| Silene catholica | |
| Silene coeli-rosa | Rose-of-Heaven |
| Silene conica | Sand Catchfly |
| Silene conoidea | |
| Silene cordifolia | Heart-leaved Catchfly |
| Silene cretica | |
| Silene cserei | |
| Silene dichotoma | Forked Catchfly |
| Silene dioica | Red Campion |
| Silene fabaria | |
| Silene fimbriata | Fringed Campion |
| Silene gallica | Small-flowered Catchfly |
| Silene holzmannii | |
| Silene inaperta | |
| Silene integripetala | |
| Silene italica | Italian Catchfly |
| Silene laeta | |
| Silene latifolia | White Campion |
| Silene latifolia ssp. alba | |
| Silene latifolia ssp. latifolia | |
| Silene latifolia x dioica = S. x hampeana | |
| Silene lydia | |
| Silene muscipula | |
| Silene noctiflora | Night-flowering Catchfly |
| Silene nocturna | Mediterranean Catchfly |
| Silene nutans | Nottingham Catchfly |
| Silene otites | Spanish Catchfly |
| Silene pendula | Nodding Catchfly |
| Silene portensis | |
| Silene pseudatocion | |
| Silene pusilla | Alpine Catchfly |
| Silene quadrifida | Alpine Campion |
| Silene rubella | |
| Silene schafta | Caucasian Campion |
| Silene sedoides | |
| Silene stricta | |
| Silene tatarica | |
| Silene tridentata | |
| Silene trinervia | |
| Silene uniflora | Sea Campion |
| Silene vulgaris | Bladder Campion |
| Silene vulgaris ssp. angustifolia | |
| Silene vulgaris ssp. commutata | |
| Silene vulgaris ssp. macrocarpa | |
| Silene vulgaris ssp. vulgaris | |
| Silene vulgaris x uniflora | |
| Silphium perfoliatum | Cup-plant |
| Silybum marianum | Milk Thistle |
| Simethis planifolia | Kerry Lily |
| Simsia foetida | |
| Sinacalia tangutica | Chinese Ragwort |
| Sinapis alba | White Mustard |
| Sinapis alba ssp. alba | |
| Sinapis alba ssp. dissecta | |
| Sinapis allionii | |
| Sinapis arvensis | Charlock |
| Sinapis flexuosa | |
| Sison amomum | Stone Parsley |
| Sisymbrium altissimum | Tall Rocket |
| Sisymbrium austriacum | Austrian Rocket |
| Sisymbrium burchellii | |
| Sisymbrium capense | |
| Sisymbrium erysimoides | French Rocket |
| Sisymbrium irio | London-rocket |
| Sisymbrium loeselii | False London-rocket |
| Sisymbrium officinale | Hedge Mustard |
| Sisymbrium orientale | Eastern Rocket |
| Sisymbrium polyceratium | |
| Sisymbrium polymorphum | |
| Sisymbrium runcinatum | |
| Sisymbrium septulatum | |
| Sisymbrium strictissimum | Perennial Rocket |
| Sisymbrium thellungii | |
| Sisymbrium volgense | Russian Mustard |
| Sisyrinchium bermudiana | Blue-eyed-Grass |
| Sisyrinchium californicum | Yellow-eyed-Grass |
| Sisyrinchium laxum | Veined Yellow-eyed-grass |
| Sisyrinchium montanum | American Blue-eyed-grass |
| Sisyrinchium platense | |
| Sisyrinchium striatum | Pale Yellow-eyed-Grass |
| Sium latifolium | Greater Water-parsnip |
| Skimmia japonica | |
| Smilacina stellata | Star-flowered Lily-of-the-valley |
| Smilax aspera | Common Smilax |
| Smilax excelsa | Larger Smilax |
| Smyrnium olusatrum | Alexanders |
| Smyrnium perfoliatum | Perfoliate Alexanders |
| Snowdenia polystachya | |
| Solanum acaule | |
| Solanum americanum | Small-flowered Nightshade |
| Solanum capsicoides | Cockroach-berry |
| Solanum carolinense | Horse-nettle |
| Solanum chenopodioides | Tall Nightshade |
| Solanum commersonii | |
| Solanum curtipes | |
| Solanum dulcamara | Bittersweet |
| Solanum eleagnifolium | Silvery-leaved Nightshade |
| Solanum fontanesianum | |
| Solanum jamesii | Wild Potato |
| Solanum laciniatum | Kangaroo-Apple |
| Solanum linnaeanum | Apple of Sodom |
| Solanum lycopersicum | Tomato |
| Solanum maritimum | |
| Solanum melongena | Aubergine |
| Solanum nigrum | Black Nightshade |
| Solanum nigrum ssp. nigrum | |
| Solanum nigrum ssp. schultesii | |
| Solanum nigrum x physalifolium = S. x procurrens | |
| Solanum physalifolium | Green Nightshade |
| Solanum pimpinellifolium | Currant Tomato |
| Solanum pseudocapsicum | Winter-cherries |
| Solanum pyracanthum | |
| Solanum rostratum | Buffalo-bur |
| Solanum sarachoides | Leafy-fruited Nightshade |
| Solanum scabrum | Garden Huckleberry |
| Solanum sisymbriifolium | Red Buffalo-bur |
| Solanum torvum | Devil's-fig |
| Solanum triflorum | Small Nightshade |
| Solanum tuberosum | Potato |
| Solanum vernei | Purple Potato |
| Solanum villosum | Red Nightshade |
| Solanum villosum ssp. miniatum | |
| Solanum villosum ssp. villosum | |
| Soleirolia soleirolii | Mind-Your-Own-Business |
| Solidago calcicola | |
| Solidago canadensis | Canadian Goldenrod |
| Solidago flexicaulis | Zig-zag Goldenrod |
| Solidago gigantea | Early Goldenrod |
| Solidago gigantea ssp. serotina | |
| Solidago graminifolia | Grass-leaved Goldenrod |
| Solidago nemoralis | Grey Goldenrod |
| Solidago odora | Anise-scented Goldenrod |
| Solidago rugosa | Rough-stemmed Goldenrod |
| Solidago sempervirens | Salt-marsh Goldenrod |
| Solidago speciosa | Showy Goldenrod |
| Solidago tortifolia | Twisted-leaf Goldenrod |
| Solidago virgaurea | Goldenrod |
| Solidago virgaurea x canadensis = S. x niederederi | |
| Soliva anthemifolia | Button Onehunga-weed |
| Soliva macrocephala | |
| Soliva pterosperma | |
| Soliva sessilis | Onehunga-weed |
| Soliva stolonifera | Carpet Burweed |
| Sonchus arvensis | Perennial Sow-thistle |
| Sonchus asper | Prickly Sow-Thistle |
| Sonchus maritimus | |
| Sonchus oleraceus | Smooth Sow-Thistle |
| Sonchus oleraceus x asper | |
| Sonchus palustris | Marsh Sow-thistle |
| Sonchus tenerrimus | Slender Sow-thistle |
| Sorbaria grandiflora | |
| Sorbaria kirilowii | Chinese Sorbaria |
| Sorbaria sorbifolia | Sorbaria |
| Sorbaria tomentosa | Himalayan Sorbaria |
| Sorbus anglica | English Whitebeam |
| Sorbus aria | Common Whitebeam |
| Sorbus aria agg. | |
| Sorbus aria x rupicola | |
| Sorbus aria x torminalis = S. x tomentella | |
| Sorbus arranensis | Arran Whitebeam |
| Sorbus aucuparia | Rowan |
| Sorbus aucuparia x aria = S. x thuringiaca | |
| Sorbus aucuparia x intermedia | |
| Sorbus bristoliensis | Bristol Whitebeam |
| Sorbus croceocarpa | Orange Whitebeam |
| Sorbus decipiens | Sharp-toothed Whitebeam |
| Sorbus devoniensis | Devon Whitebeam |
| Sorbus domestica | Service-tree |
| Sorbus eminens | Round-leaved Whitebeam |
| Sorbus hibernica | Irish Whitebeam |
| Sorbus hupehensis | Hupeh Rowan |
| Sorbus hybrida | Swedish Service-tree |
| Sorbus intermedia | Swedish Whitebeam |
| Sorbus intermedia agg. | |
| Sorbus lancastriensis | Lancastrian Whitebeam |
| Sorbus latifolia | Broad-leaved Whitebeam |
| Sorbus latifolia agg. | |
| Sorbus leptophylla | Thin-leaved Whitebeam |
| Sorbus leyana | Ley's Whitebeam |
| Sorbus minima | Least Whitebeam |
| Sorbus porrigentiformis | Grey-leaved Whitebeam |
| Sorbus porrigentiformis x torminalis | |
| Sorbus pseudofennica | Arran Service-tree |
| Sorbus pseudomeinichii | False Rowan |
| Sorbus rupicola | Rock Whitebeam |
| Sorbus sargentiana | Sargent's Rowan |
| Sorbus subcuneata | Somerset Whitebeam |
| Sorbus torminalis | Wild Service-tree |
| Sorbus vexans | Bloody Whitebeam |
| Sorbus vilmorinii | Vilmorin's Rowan |
| Sorbus whiteana | White's Whitebeam |
| Sorbus wilmottiana | Wilmott's Whitebeam |
| Sorghum arundinaceum | |
| Sorghum bicolor | Great Millet |
| Sorghum halepense | Johnson-grass |
| Sparaxis grandiflora | Plain Harlequinflower |
| Sparganium angustifolium | Floating Bur-reed |
| Sparganium emersum | Un-branched Bur-Reed |
| Sparganium emersum x angustifolium = S. x diversifolium | |
| Sparganium erectum | Branched Bur-Reed |
| Sparganium erectum ssp. erectum | |
| Sparganium erectum ssp. microcarpum | |
| Sparganium erectum ssp. neglectum | |
| Sparganium erectum ssp. oocarpum | |
| Sparganium natans | Least Bur-reed |
| Spartina alterniflora | Smooth Cord-grass |
| Spartina anglica | Common Cord-Grass |
| Spartina maritima | Small Cord-grass |
| Spartina maritima x alterniflora = S. x townsendii | Townsend's Cord-grass |
| Spartina patens | Saltmeadow Cord-grass |
| Spartina pectinata | Prairie Cord-grass |
| Spartium junceum | Spanish Broom |
| Spergula arvensis | Corn Spurrey |
| Spergula morisonii | Pearlwort Spurrey |
| Spergularia bocconei | Greek Sea-spurrey |
| Spergularia diandra | Lesser |
| Spergularia marina | Lesser Sea-Spurrey |
| Spergularia media | Greater Sea-Spurrey |
| Spergularia nicaeensis | |
| Spergularia purpurea | |
| Spergularia rubra | Sand Spurrey |
| Spergularia rupicola | Rock Sea-Spurrey |
| Spergularia rupicola x marina | |
| Spermolepis divaricatus | |
| Spermolepis echinatus | |
| Sphenopus divaricatus | |
| Spilanthes decumbens | |
| Spinacia oleracea | Spinach |
| Spiraea alba | Pale Bridewort |
| Spiraea alba x douglasii = S. x billardii | Billard's Bridewort |
| Spiraea canescens | Himalayan Spiraea |
| Spiraea cantoniensis x trilobata = S. x vanhouttei | Van Houtte's Spiraea |
| Spiraea chamaedryfolia | Elm-leaved Spiraea |
| Spiraea chamaedryfolia ssp. ulmifolia | |
| Spiraea douglasii | Steeplebush |
| Spiraea douglasii ssp. douglasii | |
| Spiraea douglasii ssp. menziesii | |
| Spiraea douglasii x canescens = S. x brachybotrys | Lange's Spiraea |
| Spiraea hypericifolia | |
| Spiraea japonica | Japanese Spiraea |
| Spiraea media | Russian Spiraea |
| Spiraea multiflora x thunbergii = S. x arguta | Bridal-spray |
| Spiraea salicifolia | Bridewort |
| Spiraea salicifolia agg. | |
| Spiraea salicifolia x alba = S. x rosalba | Intermediate Bridewort |
| Spiraea salicifolia x douglasii = S. x pseudosalicifolia | Confused Bridewort |
| Spiraea tomentosa | Hardhack |
| Spiraea trilobata | |
| Spiranthes aestivalis | Summer Lady's-tresses |
| Spiranthes romanzoffiana | Irish Lady's-Tresses |
| Spiranthes spiralis | Autumn Lady's-Tresses |
| Spirodela polyrhiza | Greater Duckweed |
| Sporobolus africanus | African Dropseed |
| Sporobolus asper | |
| Sporobolus caroli | |
| Sporobolus creber | |
| Sporobolus cryptandrus | |
| Sporobolus elongatus | |
| Sporobolus engleri | |
| Sporobolus fimbriatus | |
| Sporobolus indicus | |
| Sporobolus ioclados | |
| Sporobolus mitchellii | |
| Sporobolus pyramidatus | |
| Stachys alpina | Limestone Woundwort |
| Stachys annua | Annual Yellow-woundwort |
| Stachys arvensis | Field Woundwort |
| Stachys byzantina | Lamb's-Ear |
| Stachys coccinea | |
| Stachys cretica | |
| Stachys germanica | Downy Woundwort |
| Stachys heraclea | |
| Stachys macrantha | |
| Stachys ocymastrum | |
| Stachys palustris | Marsh Woundwort |
| Stachys recta | Perennial Yellow-woundwort |
| Stachys sylvatica | Hedge Woundwort |
| Stachys sylvatica x palustris = S. x ambigua | Hybrid Woundwort |
| Staphylea colchica | Caucasian Bladdernut |
| Staphylea pinnata | Bladdernut |
| Steinchisma hians | |
| Stellaria alsine | Bog Stitchwort |
| Stellaria graminea | Lesser Stitchwort |
| Stellaria holostea | Greater Stitchwort |
| Stellaria media | Common Chickweed |
| Stellaria neglecta | Greater Chickweed |
| Stellaria nemorum | Wood Stitchwort |
| Stellaria nemorum ssp. montana | |
| Stellaria nemorum ssp. nemorum | |
| Stellaria pallida | Lesser Chickweed |
| Stellaria palustris | Marsh Stitchwort |
| Stephanandra incisa | Lace-shrub |
| Sternbergia lutea | Winter Daffodil |
| Stevia paniculata | |
| Stipa ambigua | |
| Stipa aristiglumis | |
| Stipa blackii | |
| Stipa capensis | Mediterranean Needle-grass |
| Stipa caudata | |
| Stipa dregeana | |
| Stipa neesiana | American Needle-grass |
| Stipa nitida | |
| Stipa papposa | |
| Stipa scabra | |
| Stipa scabra ssp. falcata | |
| Stipa scabra ssp. scabra | |
| Stipa variabilis | |
| Stipa verticillata | |
| Stratiotes aloides | Water-Soldier |
| Stuartina hamata | Hooked Cudweed |
| Stuartina muelleri | Spoon-leaved Cudweed |
| Suaeda altissima | |
| Suaeda maritima | Annual Sea-blite |
| Suaeda vera | Shrubby Sea-Blite |
| Subularia aquatica | Awlwort |
| Succisa pratensis | Devil's-bit Scabious |
| Succisella inflexa | |
| Succowia balearica | |
| Symphoricarpos albus | Snowberry |
| Symphoricarpos microphyllus | |
| Symphoricarpos microphyllus x orbiculatus = S. x chenaultii | Hybrid Coralberry |
| Symphoricarpos orbiculatus | Coralberry |
| Symphyandra hofmannii | |
| Symphytum asperum | Rough Comfrey |
| Symphytum asperum x caucasicum | |
| Symphytum brachycalyx | |
| Symphytum bulbosum | Bulbous Comfrey |
| Symphytum caucasicum | Caucasian Comfrey |
| Symphytum grandiflorum | Creeping Comfrey |
| Symphytum officinale | Common Comfrey |
| Symphytum officinale ssp. bohemicum | |
| Symphytum officinale ssp. officinale | |
| Symphytum officinale ssp. uliginosum | |
| Symphytum officinale x asperum = S. x uplandicum | Russian Comfrey |
| Symphytum officinale x asperum x grandiflorum = S. 'Hidcote-Blue' | Hidcote Comfrey |
| Symphytum officinale x asperum x tuberosum | |
| Symphytum orientale | White Comfrey |
| Symphytum tauricum | Crimean Comfrey |
| Symphytum tuberosum | Tuberous Comfrey |
| Symphytum tuberosum ssp. nodosum | |
| Symphytum tuberosum ssp. tuberosum | |
| Syrenia cana | |
| Syringa vulgaris | Lilac |
| Syringa x persica | Persian Lilac |
| Taeniatherum caput-medusae | |
| Tagetes erecta | African Marigold |
| Tagetes erythrocephala | |
| Tagetes gracilis | |
| Tagetes micrantha | |
| Tagetes minuta | Southern Marigold |
| Tagetes patula | French Marigold |
| Tagetes tenuifolia | Signet Marigold |
| Tamarix africana | African Tamarisk |
| Tamarix chinensis | Chinese Tamarisk |
| Tamarix gallica | Tamarisk |
| Tamarix parviflora | |
| Tamarix tetrandra | |
| Tamus communis | Black Bryony |
| Tanacetum balsamita | Costmary |
| Tanacetum cinerariifolium | Dalmatian Pyrethrum |
| Tanacetum coccineum | Garden Pyrethrum |
| Tanacetum corymbosum | Scentless Feverfew |
| Tanacetum leucophyllum | |
| Tanacetum macrophyllum | Rayed Tansy |
| Tanacetum parthenium | Feverfew |
| Tanacetum vulgare | Tansy |
| Taraxacum aberrans | |
| Taraxacum acroglossum | |
| Taraxacum acutifidum | |
| Taraxacum acutifrons | |
| Taraxacum acutum | |
| Taraxacum adiantifrons | |
| Taraxacum aequilobum | |
| Taraxacum aequisectum | |
| Taraxacum akteum | |
| Taraxacum alatum | |
| Taraxacum altissimum | |
| Taraxacum amarellum | |
| Taraxacum amplum | |
| Taraxacum ancistrolobum | |
| Taraxacum anglicum | |
| Taraxacum angulare | |
| Taraxacum angustisquameum | |
| Taraxacum arenastrum | |
| Taraxacum argutum | |
| Taraxacum atactum | |
| Taraxacum atonolobum | |
| Taraxacum aurosulum | |
| Taraxacum beeftinkii | |
| Taraxacum berthae | |
| Taraxacum boekmanii | |
| Taraxacum brachyglossum | |
| Taraxacum bracteatum | |
| Taraxacum breconense | |
| Taraxacum britannicum | |
| Taraxacum caledonicum | |
| Taraxacum caloschistum | |
| Taraxacum cambricum | |
| Taraxacum celticum | |
| Taraxacum cenabense | |
| Taraxacum ceratolobum | |
| Taraxacum cherwellense | |
| Taraxacum chloroticum | |
| Taraxacum chrysophaenum | |
| Taraxacum ciliare | |
| Taraxacum clovense | |
| Taraxacum coartatum | |
| Taraxacum commixtum | |
| Taraxacum cophocentrum | |
| Taraxacum cordatum | |
| Taraxacum cornubiense | |
| Taraxacum corynodes | |
| Taraxacum craspedotum | |
| Taraxacum croceiflorum | |
| Taraxacum curtifrons | |
| Taraxacum cyanolepis | |
| Taraxacum cymbifolium | |
| Taraxacum dahlstedtii | |
| Taraxacum degelii | |
| Taraxacum densilobum | |
| Taraxacum diastematicum | |
| Taraxacum dilaceratum | |
| Taraxacum dilatatum | |
| Taraxacum disseminatum | |
| Taraxacum drucei | |
| Taraxacum dunense | |
| Taraxacum duplidentifrons | |
| Taraxacum edmondsonianum | |
| Taraxacum ekmanii | |
| Taraxacum euryphyllum | |
| Taraxacum exacutum | |
| Taraxacum excellens | |
| Taraxacum expallidiforme | |
| Taraxacum exsertiforme | |
| Taraxacum exsertum | |
| Taraxacum faeroense | |
| Taraxacum fagerstroemii | |
| Taraxacum falcatum | |
| Taraxacum fasciatum | |
| Taraxacum fulgidum | |
| Taraxacum fulvicarpum | |
| Taraxacum fulviforme | |
| Taraxacum fulvum | |
| Taraxacum fusciflorum | |
| Taraxacum geirhildae | |
| Taraxacum gelertii | |
| Taraxacum glauciniforme | |
| Taraxacum gotlandicum | |
| Taraxacum haematicum | |
| Taraxacum hamatiforme | |
| Taraxacum hamatulum | |
| Taraxacum hamatum | |
| Taraxacum hamiferum | |
| Taraxacum haworthianum | |
| Taraxacum hepaticum | |
| Taraxacum hesperium | |
| Taraxacum hexhamense | |
| Taraxacum hirsutissimum | |
| Taraxacum horridifrons | |
| Taraxacum huelphersianum | |
| Taraxacum hygrophilum | |
| Taraxacum inane | |
| Taraxacum incisum | |
| Taraxacum inopinatum | |
| Taraxacum insigne | |
| Taraxacum interveniens | |
| Taraxacum intumescens | |
| Taraxacum kernianum | |
| Taraxacum lacerifolium | |
| Taraxacum laciniosifrons | |
| Taraxacum laciniosum | |
| Taraxacum lacistophyllum | |
| Taraxacum laeticolor | |
| Taraxacum lamprophyllum | |
| Taraxacum lancastriense | |
| Taraxacum lancidens | |
| Taraxacum landmarkii | |
| Taraxacum latens | |
| Taraxacum laticordatum | |
| Taraxacum latisectum | |
| Taraxacum latissimum | |
| Taraxacum lepidum | |
| Taraxacum leptodon | |
| Taraxacum leucopodum | |
| Taraxacum lingulatum | |
| Taraxacum longisquameum | |
| Taraxacum lucidum | |
| Taraxacum lunare | |
| Taraxacum luteum | |
| Taraxacum macranthoides | |
| Taraxacum macrolobum | |
| Taraxacum maculatum | |
| Taraxacum maculosum | |
| Taraxacum margettsii | |
| Taraxacum marklundii | |
| Taraxacum melanthoides | |
| Taraxacum mimulum | |
| Taraxacum multicolorans | |
| Taraxacum naevosiforme | |
| Taraxacum naevosum | |
| Taraxacum necessarium | |
| Taraxacum nietoi | |
| Taraxacum nigridentatum | |
| Taraxacum nitidum | |
| Taraxacum nordstedtii | |
| Taraxacum obliquilobum | |
| Taraxacum obliquum | |
| Taraxacum oblongatum | |
| Taraxacum obtusifrons | |
| Taraxacum obtusilobum | |
| Taraxacum ochrochlorum | |
| Taraxacum oellgaardii | |
| Taraxacum officinale agg. | |
| Taraxacum olgae | |
| Taraxacum orcadense | |
| Taraxacum ostenfeldii | |
| Taraxacum oxoniense | |
| Taraxacum pachylobum | |
| Taraxacum pachymerum | |
| Taraxacum pallescens | |
| Taraxacum pallidipes | |
| Taraxacum palustre | |
| Taraxacum palustrisquameum | |
| Taraxacum pannucium | |
| Taraxacum pannulatiforme | |
| Taraxacum pannulatum | |
| Taraxacum parnassicum | |
| Taraxacum pectinatiforme | |
| Taraxacum piceatum | |
| Taraxacum placidum | |
| Taraxacum planum | |
| Taraxacum platyglossum | |
| Taraxacum polyhamatum | |
| Taraxacum polyodon | |
| Taraxacum porrigens | |
| Taraxacum porteri | |
| Taraxacum prionum | |
| Taraxacum procerisquameum | |
| Taraxacum proximiforme | |
| Taraxacum proximum | |
| Taraxacum pruinatum | |
| Taraxacum pseudohamatum | |
| Taraxacum pseudolarssonii | |
| Taraxacum pseudonordstedtii | |
| Taraxacum pseudoproximum | |
| Taraxacum pseudoretroflexum | |
| Taraxacum pulchrifolium | |
| Taraxacum pycnostictum | |
| Taraxacum quadrans | |
| Taraxacum remanentilobum | |
| Taraxacum retroflexum | |
| Taraxacum retzii | |
| Taraxacum rhamphodes | |
| Taraxacum richardsianum | |
| Taraxacum rubellum | |
| Taraxacum rubicundum | |
| Taraxacum rubrisquameum | |
| Taraxacum sagittipotens | |
| Taraxacum sahlinianum | |
| Taraxacum scanicum | |
| Taraxacum scoticum | |
| Taraxacum scotiniforme | |
| Taraxacum sellandii | |
| Taraxacum semiglobosum | |
| Taraxacum serpenticola | |
| Taraxacum sinuatum | |
| Taraxacum speciosum | |
| Taraxacum spiculatum | |
| Taraxacum stenacrum | |
| Taraxacum stereodes | |
| Taraxacum stictophyllum | |
| Taraxacum subbracteatum | |
| Taraxacum subcyanolepis | |
| Taraxacum subexpallidum | |
| Taraxacum subhamatum | |
| Taraxacum subhuelphersianum | |
| Taraxacum sublaeticolor | |
| Taraxacum sublongisquameum | |
| Taraxacum subnaevosum | |
| Taraxacum subundulatum | |
| Taraxacum subxanthostigma | |
| Taraxacum sundbergii | |
| Taraxacum tamesense | |
| Taraxacum tanylepis | |
| Taraxacum tanyphyllum | |
| Taraxacum tenebricans | |
| Taraxacum texelense | |
| Taraxacum tortilobum | |
| Taraxacum trilobatum | |
| Taraxacum tumentilobum | |
| Taraxacum undulatiflorum | |
| Taraxacum undulatum | |
| Taraxacum unguilobum | |
| Taraxacum valens | |
| Taraxacum vastisectum | |
| Taraxacum wallonicum | |
| Taraxacum webbii | |
| Taraxacum xanthostigma | |
| Taraxacum xiphoideum | |
| Taxodium distichum | Swamp Cypress |
| Taxus baccata | Yew |
| Teesdalia nudicaulis | Shepherd's Cress |
| Telekia speciosa | Yellow Oxeye |
| Tellima grandiflora | Fringe Cups |
| Tephroseris integrifolia | Field Fleawort |
| Tephroseris integrifolia ssp. integrifolia | |
| Tephroseris integrifolia ssp. maritima | |
| Tephroseris palustris | Marsh Fleawort |
| Tephroseris palustris ssp. congesta | |
| Tetracme quadricornis | |
| Tetragonia crystallina | |
| Tetragonia tetragonioides | New Zealand Spinach |
| Tetragonolobus biflorus | |
| Tetragonolobus maritimus | Dragon's-Teeth |
| Tetragonolobus purpureus | Asparagus-pea |
| Teucrium botrys | Cut-leaved Germander |
| Teucrium chamaedrys | Wall Germander |
| Teucrium flavum | |
| Teucrium fruticans | Shrubby Germander |
| Teucrium resupinatum | |
| Teucrium scordium | Water Germander |
| Teucrium scorodonia | Wood Sage |
| Teucrium spinosum | |
| Thalictrum alpinum | Alpine Meadow-Rue |
| Thalictrum aquilegiifolium | French Meadow-Rue |
| Thalictrum delavayi | Chinese Meadow-rue |
| Thalictrum flavum | Common Meadow-Rue |
| Thalictrum lucidum | Shining Meadow-rue |
| Thalictrum minus | Lesser Meadow-Rue |
| Thalictrum simplex | Small Meadow-rue |
| Thalictrum speciosissimum | |
| Thamnocalamus spathiflorus | |
| Thelesperma trifidum | Fine-leaved Thelesperma |
| Thelypodium lasiophyllum | Cutleaf Thelypody |
| Thelypteris palustris | Marsh Fern |
| Thermopsis montana | False Lupin |
| Thesium arvense | |
| Thesium humifusum | Bastard Toadflax |
| Thlaspi alliaceum | Garlic Penny-cress |
| Thlaspi arvense | Field Penny-Cress |
| Thlaspi caerulescens | Alpine Penny-cress |
| Thlaspi macrophyllum | Caucasian Penny-cress |
| Thuja occidentalis | Northern White-cedar |
| Thuja plicata | Western Red-cedar |
| Thujopsis dolabrata | Hiba |
| Thymelaea passerina | Annual Thymelaea |
| Thymus polytrichus | Wild Thyme |
| Thymus polytrichus ssp. ligusticus | |
| Thymus pulegioides | Large Garden |
| Thymus serpyllum | Breckland Garden |
| Thymus vulgaris | Garden Thyme |
| Thyridolepis xerophila | |
| Thyselium palustre | Milk-parsley |
| Tiarella cordifolia | Foamflower |
| Tiarella wherryi | Tufted Foamflower |
| Tilia cordata | Small-leaved Lime |
| Tilia cordata x dasystyla = T. x euchlora | Caucasian Lime |
| Tilia platyphyllos | Large-leaved Lime |
| Tilia platyphyllos ssp. cordifolia | |
| Tilia platyphyllos x cordata = T. x europaea | Lime |
| Tilia tomentosa | Silver Lime |
| Tillandsia crocata | |
| Tofieldia pusilla | Scottish Asphodel |
| Tolmiea menziesii | Pick-a-back-plant |
| Tolpis barbata | |
| Tolypella glomerata | Clustered Stonewort |
| Tolypella intricata | Tassel Stonewort |
| Tolypella nidifica | Bird's-nest Stonewort |
| Tolypella prolifera | Great Tassel Stonewort |
| Tordylium aegyptiacum | |
| Tordylium maximum | Hartwort |
| Tordylium syriacum | |
| Torilis arvensis | Spreading Hedge-Parsley |
| Torilis japonica | Upright Hedge-Parsley |
| Torilis leptophylla | |
| Torilis nodosa | Knotted Hedge-Parsley |
| Torilis stocksiana | |
| Torilis tenella | |
| Torilis ucranica | |
| Trachelium caeruleum | Throatwort |
| Trachycarpus fortunei | Chusan Palm |
| Trachymene cyanopetala | Purple Trachymene |
| Trachymene pilosa | Dwarf Trachymene |
| Trachyspermum ammi | Ajowan |
| Trachystemon orientalis | Abraham-Isaac-Jacob |
| Tradescantia fluminensis | Wandering-jew |
| Tradescantia pallida | Purple-heart |
| Tradescantia virginiana | Spiderwort |
| Tradescantia zebrina | Inch-plant |
| Tragopogon crocifolius | |
| Tragopogon hybridus | Slender Salsify |
| Tragopogon porrifolius | Salsify |
| Tragopogon pratensis | Goat's-beard |
| Tragopogon pratensis ssp. minor | |
| Tragopogon pratensis ssp. orientalis | |
| Tragopogon pratensis ssp. pratensis | |
| Tragopogon pratensis x porrifolius = T. x mirabilis | |
| Tragus australianus | Australian Bur-grass |
| Tragus berteronianus | African Bur-grass |
| Tragus koelerioides | |
| Tragus racemosus | European Bur-grass |
| Tribolium echinatum | |
| Tribulus terrestris | Small Caltrops |
| Tricholaena monachne | |
| Trichomanes speciosum | Killarney Fern |
| Trichomanes venosum | Veined Bristle-fern |
| Trichophorum alpinum | Cotton Deergrass |
| Trichophorum cespitosum | Deergrass |
| Trichophorum cespitosum ssp. cespitosum | |
| Trichophorum cespitosum ssp. germanicum | |
| Tridens brasiliensis | |
| Trientalis borealis | Starflower |
| Trientalis europaea | Chickweed Wintergreen |
| Trifolium affine | |
| Trifolium albidum | |
| Trifolium alexandrinum | Egyptian Clover |
| Trifolium alpestre | |
| Trifolium angulatum | |
| Trifolium angustifolium | Narrow Clover |
| Trifolium arvense | Hare's-foot Clover |
| Trifolium aureum | Large Trefoil |
| Trifolium badium | Brown Clover |
| Trifolium beckwithii | Beckwith's Clover |
| Trifolium bocconei | Twin-headed Clover |
| Trifolium campestre | Hop Trefoil |
| Trifolium cernuum | Nodding Clover |
| Trifolium cherleri | |
| Trifolium ciliolatum | Foothill Clover |
| Trifolium clypeatum | |
| Trifolium constantinopolitanum | |
| Trifolium dasyurum | |
| Trifolium depauperatum | Poverty Clover |
| Trifolium diffusum | |
| Trifolium dubium | Lesser Trefoil |
| Trifolium echinatum | Hedgehog Clover |
| Trifolium fragiferum | Strawberry Clover |
| Trifolium fragiferum ssp. bonannii | |
| Trifolium fragiferum ssp. fragiferum | |
| Trifolium fucatum | |
| Trifolium gemellum | |
| Trifolium glomeratum | Clustered Clover |
| Trifolium gracilentum | Slender Clover |
| Trifolium grandiflorum | |
| Trifolium hirtum | Rose Clover |
| Trifolium hybridum | Alsike Clover |
| Trifolium hybridum ssp. elegans | |
| Trifolium hybridum ssp. hybridum | |
| Trifolium incarnatum | |
| Trifolium incarnatum ssp. incarnatum | Crimson Clover |
| Trifolium incarnatum ssp. molinerii | Long-headed Clover |
| Trifolium isthmocarpum | |
| Trifolium lappaceum | Bur Clover |
| Trifolium leucanthum | |
| Trifolium ligusticum | |
| Trifolium medium | Zig-Zag Clover |
| Trifolium michelianum | |
| Trifolium micranthum | Slender Trefoil |
| Trifolium microcephalum | Small-headed Clover |
| Trifolium mutabile | |
| Trifolium nervulosum | |
| Trifolium nigrescens | |
| Trifolium occidentale | Western Clover |
| Trifolium ochroleucon | Sulphur Clover |
| Trifolium ornithopodioides | Bird's-Foot Clover |
| Trifolium pallidum | |
| Trifolium pannonicum | Hungarian Clover |
| Trifolium patens | |
| Trifolium pilulare | |
| Trifolium pratense | Red Clover |
| Trifolium purpureum | Purple Clover |
| Trifolium repens | White Clover |
| Trifolium resupinatum | Reversed Clover |
| Trifolium retusum | |
| Trifolium roussaeanum | |
| Trifolium scabrum | Rough Clover |
| Trifolium spumosum | |
| Trifolium squamosum | Sea Clover |
| Trifolium squarrosum | |
| Trifolium stellatum | Starry Clover |
| Trifolium stipulaceum | |
| Trifolium striatum | Knotted Clover |
| Trifolium strictum | Upright Clover |
| Trifolium subterraneum | Subterranean Clover |
| Trifolium suffocatum | Suffocated Clover |
| Trifolium tenuifolium | |
| Trifolium thalii | |
| Trifolium tomentosum | Woolly Clover |
| Trifolium vesiculosum | |
| Trifolium wormskioldii | Springbank Clover |
| Triglochin maritima | Sea Arrow-grass |
| Triglochin palustris | Marsh Arrow-grass |
| Trigonella arabica | |
| Trigonella aurantiaca | |
| Trigonella caelesyriaca | |
| Trigonella caerulea | Blue Fenugreek |
| Trigonella caerulescens | |
| Trigonella corniculata | Sickle-fruited Fenugreek |
| Trigonella crassipes | |
| Trigonella fischeriana | |
| Trigonella foenum-graecum | Fenugreek |
| Trigonella glabra | Egyptian Fenugreek |
| Trigonella gladiata | |
| Trigonella incisa | |
| Trigonella kotschyi | |
| Trigonella laciniata | |
| Trigonella maritima | |
| Trigonella monantha | |
| Trigonella monspeliaca | Star-fruited Fenugreek |
| Trigonella polyceratia | |
| Trigonella procumbens | |
| Trigonella stellata | |
| Trigonella tenuis | |
| Trinia glauca | Honewort |
| Triodanis biflora | |
| Triodanis perfoliata | |
| Triplachne nitens | |
| Tripleurospermum inodorum | Scentless Mayweed |
| Tripleurospermum maritimum | Sea Mayweed |
| Tripleurospermum maritimum agg. | |
| Tripleurospermum maritimum x inodorum | |
| Triptilodiscus pygmaeus | Common Sunray |
| Triraphis mollis | |
| Trisetaria aurea | |
| Trisetaria loeflingiana | |
| Trisetaria michelii | |
| Trisetaria panicea | |
| Trisetaria scabriuscula | |
| Trisetum flavescens | Yellow Oat-grass |
| Trisetum flavescens ssp. flavescens | |
| Trisetum flavescens ssp. purpurascens | |
| Trisetum spicatum | |
| Tristagma uniflorum | Spring Starflower |
| Triticum aestivum | Bread Wheat |
| Triticum dicoccon | Emmer |
| Triticum durum | Pasta Wheat |
| Triticum monococcum | Einkorn |
| Triticum spelta | Spelt |
| Triticum turgidum | Rivet Wheat |
| Triumfetta annua | |
| Troglophyton parvulum | |
| Trollius europaeus | Globeflower |
| Tropaeolum majus | Nasturtium |
| Tropaeolum minus | Dwarf Nasturtium |
| Tropaeolum peregrinum | Canary-creeper |
| Tropaeolum speciosum | Flame Nasturtium |
| Tsuga canadensis | Eastern Hemlock-spruce |
| Tsuga heterophylla | Western Hemlock-Spruce |
| Tuberaria guttata | Spotted Rock-rose |
| Tuberaria lignosa | |
| Tulbaghia natalensis | |
| Tulipa gesneriana | Garden Tulip |
| Tulipa greigii | |
| Tulipa saxatilis | Cretan Tulip |
| Tulipa sylvestris | Wild Tulip |
| Turgenia latifolia | Greater Bur-parsley |
| Turritis glabra | Tower Mustard |
| Tussilago farfara | Colt's-foot |
| Typha angustifolia | Lesser Bulrush |
| Typha latifolia | Bulrush |
| Typha latifolia x angustifolia = T. x glauca | |
| Typha laxmannii | |
| Ugni molinae | Chilean Guava |
| Ulex europaeus | Gorse |
| Ulex europaeus x gallii = U. x breoganii | |
| Ulex gallii | Western Gorse |
| Ulex gallii x minor | |
| Ulex minor | Dwarf Gorse |
| Ulmus glabra | Wych Elm |
| Ulmus glabra ssp. glabra | |
| Ulmus glabra ssp. montana | |
| Ulmus glabra x minor = U. x vegeta | Huntingdon Elm |
| Ulmus glabra x minor x plotii = U. x hollandica | Dutch Elm |
| Ulmus glabra x plotii = U. ? x elegantissima | |
| Ulmus glabra x procera | |
| Ulmus laevis | European White-elm |
| Ulmus minor | |
| Ulmus minor agg. | |
| Ulmus minor ssp. angustifolia | Cornish Elm |
| Ulmus minor ssp. minor | Small-leaved Elm |
| Ulmus minor ssp. sarniensis | Jersey Elm |
| Ulmus minor x plotii = U. x viminalis | |
| Ulmus plotii | Plot's Elm |
| Ulmus procera | English Elm |
| Ulmus procera x minor | |
| Ulmus procera x plotii | |
| Ulmus thomasii | Rock Elm |
| Umbellularia californica | Californian Bay |
| Umbilicus rupestris | Navelwort |
| Urocarpidium peruvianum | Scabrous Mallow |
| Urocarpidium shepardiae | |
| Urochloa panicoides | Sharp-flowered Signal-grass |
| Urospermum dalechampii | |
| Urospermum picroides | |
| Urtica dioica | Common Nettle |
| Urtica dioica ssp. dioica | |
| Urtica dioica ssp. galeopsifolia | |
| Urtica flabellata | |
| Urtica incisa | Scrub Nettle |
| Urtica massaica | |
| Urtica pilulifera | Roman Nettle |
| Urtica urens | Small Nettle |
| Utricularia australis | Bladderwort |
| Utricularia intermedia | Intermediate Bladderwort |
| Utricularia intermedia agg. | |
| Utricularia minor | Lesser Bladderwort |
| Utricularia ochroleuca | Pale Bladderwort |
| Utricularia stygia | Nordic Bladderwort |
| Utricularia vulgaris | Greater Bladderwort |
| Utricularia vulgaris agg. | |
| Vaccaria hispanica | Cowherb |
| Vaccinium corymbosum | Blueberry |
| Vaccinium macrocarpon | American Cranberry |
| Vaccinium microcarpum | Small Cranberry |
| Vaccinium myrtillus | Bilberry |
| Vaccinium oxycoccos | Cranberry |
| Vaccinium uliginosum | Bog Bilberry |
| Vaccinium vitis-idaea | Cowberry |
| Vaccinium vitis-idaea x myrtillus = V. x intermedium | |
| Valantia muralis | |
| Valeriana dioica | Marsh Valerian |
| Valeriana officinalis | Common Valerian |
| Valeriana phu | |
| Valeriana pyrenaica | Pyrenean Valerian |
| Valerianella carinata | Keeled-Fruited Cornsalad |
| Valerianella coronata | |
| Valerianella dentata | Narrow-Fruited Cornsalad |
| Valerianella discoidea | |
| Valerianella eriocarpa | Hairy-Fruited Cornsalad |
| Valerianella kotschyi | |
| Valerianella locusta | Common Cornsalad |
| Valerianella microcarpa | |
| Valerianella rimosa | Broad-Fruited Cornsalad |
| Vallisneria spiralis | Tapegrass |
| Vancouveria planipetala | Redwood-ivy |
| Velezia rigida | |
| Vellereophyton dealbatum | White Cudweed |
| Ventenata dubia | |
| Ventenata macra | |
| Veratrum viride | Giant False-helleborine |
| Verbascum blattaria | Moth Mullein |
| Verbascum blattaria x nigrum = V. x intermedium | |
| Verbascum boerhavii | |
| Verbascum bombyciferum | Broussa Mullein |
| Verbascum chaixii | Nettle-leaved Mullein |
| Verbascum creticum | Cretan Mullein |
| Verbascum densiflorum | Dense-flowered Mullein |
| Verbascum lychnitis | White Mullein |
| Verbascum nigrum | Dark Mullein |
| Verbascum nigrum x lychnitis = V. x incanum | |
| Verbascum nigrum x pulverulentum = V. x mixtum | |
| Verbascum olympicum | |
| Verbascum ovalifolium | |
| Verbascum phlomoides | Orange Mullein |
| Verbascum phlomoides x thapsus = V. x kerneri | |
| Verbascum phoeniceum | Purple Mullein |
| Verbascum pulverulentum | Hoary Mullein |
| Verbascum pulverulentum x lychnitis = V. x regelianum | |
| Verbascum pyramidatum | Caucasian Mullein |
| Verbascum pyramidatum x nigrum | |
| Verbascum pyramidatum x thapsus | |
| Verbascum sinuatum | |
| Verbascum speciosum | Hungarian Mullein |
| Verbascum thapsus | Great Mullein |
| Verbascum thapsus ssp. giganteum | |
| Verbascum thapsus x lychnitis = V. x thapsi | |
| Verbascum thapsus x nigrum = V. x semialbum | |
| Verbascum thapsus x pulverulentum = V. x godronii | |
| Verbascum thapsus x speciosum = V. x duernsteinense | |
| Verbascum virgatum | Twiggy Mullein |
| Verbascum virgatum x thapsus = V. x lemaitrei | |
| Verbena bonariensis | Argentinian Vervain |
| Verbena bracteata | Bracted Vervain |
| Verbena elegans | Elegant Vervain |
| Verbena hastata | American Vervain |
| Verbena hispida | Hairy Vervain |
| Verbena litoralis | Brazilian Vervain |
| Verbena menthifolia | Mint-leaved Vervain |
| Verbena officinalis | Vervain |
| Verbena platensis | |
| Verbena rigida | Slender Vervain |
| Verbena supina | Trailing Vervain |
| Verbena tenuisecta | |
| Verbena urticifolia | Nettle-leaved Vervain |
| Verbena x hybrida | Hybrid Verbena |
| Verbesina australis | |
| Verbesina encelioides | Golden Crownbeard |
| Veronica acinifolia | French Speedwell |
| Veronica agrestis | Green Field-Speedwell |
| Veronica alpina | Alpine Speedwell |
| Veronica anagallis-aquatica | Blue Water-Speedwell |
| Veronica anagallis-aquatica x catenata = V. x lackschewitzii | |
| Veronica arvensis | Wall Speedwell |
| Veronica austriaca | Large Speedwell |
| Veronica austriaca ssp. teucrium | |
| Veronica barkeri | Barker's Hebe |
| Veronica bachofenii | |
| Veronica beccabunga | Brooklime |
| Veronica brachysiphon | Hooker's Hebe |
| Veronica calycina | Cup Speedwell |
| Veronica campylopoda | |
| Veronica catenata | Pink Water-Speedwell |
| Veronica chamaedrys | Germander Speedwell |
| Veronica chamaepithyoides | |
| Veronica crista-galli | Crested Field-speedwell |
| Veronica cupressoides | |
| Veronica cymbalaria | Pale Speedwell |
| Veronica dieffenbachii | Dieffenbach's Hebe |
| Veronica elliptica x speciosa = Veronica x franciscana | Hedge Veronica |
| Veronica filiformis | Slender Speedwell |
| Veronica fruticans | Rock Speedwell |
| Veronica gentianoides | |
| Veronica glauca | |
| Veronica grandis | |
| Veronica grisebachii | |
| Veronica hederifolia | Ivy-Leaved Speedwell |
| Veronica hederifolia ssp. hederifolia | |
| Veronica hederifolia ssp. lucorum | |
| Veronica leiophylla | |
| Veronica longifolia | Garden Speedwell |
| Veronica longifolia x spicata | |
| Veronica montana | Wood Speedwell |
| Veronica officinalis | Heath Speedwell |
| Veronica opaca | |
| Veronica orientalis | |
| Veronica paniculata | |
| Veronica parviflora | |
| Veronica peregrina | American Speedwell |
| Veronica persica | Common Field-Speedwell |
| Veronica polita | Grey-Field Speedwell |
| Veronica praecox | Breckland Speedwell |
| Veronica prostrata | Prostrate Speedwell |
| Veronica repens | Corsican Speedwell |
| Veronica salicifolia | Koromiko |
| Veronica salicifolia x elliptica = Veronica x lewisii | Lewis's Hebe |
| Veronica scutellata | Marsh Speedwell |
| Veronica serpyllifolia | Thyme-Leaved Speedwell |
| Veronica serpyllifolia ssp. humifusa | |
| Veronica serpyllifolia ssp. serpyllifolia | |
| Veronica spicata | Spiked Speedwell |
| Veronica spicata ssp. hybrida | |
| Veronica spicata ssp. orchidea | |
| Veronica spicata ssp. spicata | |
| Veronica stricta | |
| Veronica triphyllos | Fingered Speedwell |
| Veronica urticifolia | Nettle-leaved Speedwell |
| Veronica verna | Spring Speedwell |
| Veronica x amabilis | |
| Veronicastrum virginicum | Culver's-root |
| Viburnum farreri | |
| Viburnum farreri x grandiflorum = V. x bodnantense | |
| Viburnum lantana | Wayfaring-tree |
| Viburnum lantana x rhytidophyllum = V. x rhytidophylloides | |
| Viburnum lantanoides | Hobble-bush |
| Viburnum opulus | Guelder-rose |
| Viburnum rhytidophyllum | Wrinkled Viburnum |
| Viburnum tinus | Laurustinus |
| Vicia altissima | |
| Vicia amoena | |
| Vicia articulata | |
| Vicia benghalensis | Purple Vetch |
| Vicia bithynica | Bithynian Vetch |
| Vicia cassubica | Danzig Vetch |
| Vicia cracca | Tufted Vetch |
| Vicia cracca ssp. cracca | |
| Vicia cracca ssp. gerardii | |
| Vicia cretica | |
| Vicia ervilia | Ervil |
| Vicia faba | Broad Bean |
| Vicia grandiflora | |
| Vicia hirsuta | Hairy Tare |
| Vicia hookeri | Hooker's Vetch |
| Vicia hybrida | Hairy Yellow-vetch |
| Vicia hyrcanica | |
| Vicia lathyroides | Spring Vetch |
| Vicia leucantha | |
| Vicia lutea | Yellow-vetch |
| Vicia lutea ssp. lutea | |
| Vicia lutea ssp. vestita | |
| Vicia melanops | Black-eyed Vetch |
| Vicia monantha | |
| Vicia narbonensis | Narbonne Vetch |
| Vicia onobrychioides | |
| Vicia orobus | Wood Bitter-vetch |
| Vicia palaestina | |
| Vicia pannonica | Hungarian Vetch |
| Vicia parviflora | Slender Tare |
| Vicia peregrina | |
| Vicia pubescens | |
| Vicia pyrenaica | Pyrenean Vetch |
| Vicia sativa | |
| Vicia sativa ssp. nigra | Narrow-Leaved Vetch |
| Vicia sativa ssp. sativa | |
| Vicia sativa ssp. segetalis | Common Vetch |
| Vicia sepium | Bush Vetch |
| Vicia sylvatica | Wood Vetch |
| Vicia tenuifolia | Fine-leaved Vetch |
| Vicia tetrasperma | Smooth Tare |
| Vicia villosa | Fodder Vetch |
| Vigna radiata | Mung-bean |
| Villanova dissecta | |
| Vinca difformis | Intermediate Periwinkle |
| Vinca major | Greater Periwinkle |
| Vinca minor | Lesser Periwinkle |
| Vincetoxicum nigrum | Black Swallow-wort |
| Viola arvensis | Field Pansy |
| Viola biflora | Alpine Yellow-violet |
| Viola canina | Heath Dog-violet |
| Viola canina ssp. canina | |
| Viola canina ssp. montana | |
| Viola canina x lactea | |
| Viola canina x persicifolia = V. x ritschliana | |
| Viola cornuta | Horned Pansy |
| Viola declinata | |
| Viola hirta | Hairy Violet |
| Viola kitaibeliana | Dwarf Pansy |
| Viola labradorica | Labrador Violet |
| Viola lactea | Pale Dog-violet |
| Viola lutea | Mountain Pansy |
| Viola lutea x tricolor | |
| Viola lutea x tricolor x altaica = V. x wittrockiana | Garden Pansy |
| Viola odorata | Sweet Violet |
| Viola odorata x hirta = V. x scabra | |
| Viola palustris | Marsh Violet |
| Viola palustris ssp. juressi | |
| Viola palustris ssp. palustris | |
| Viola pensylvanica | Smooth Yellow-violet |
| Viola persicifolia | Fen Violet |
| Viola reichenbachiana | Early Dog-violet |
| Viola reichenbachiana x canina = V. x mixta | |
| Viola riviniana | Common Dog-Violet |
| Viola riviniana x canina = V. x intersita | |
| Viola riviniana x lactea | |
| Viola riviniana x reichenbachiana = V. x bavarica | |
| Viola rupestris | Teesdale Violet |
| Viola rupestris x riviniana = V. x burnatii | |
| Viola tricolor | Wild Pansy |
| Viola tricolor ssp. curtisii | |
| Viola tricolor ssp. tricolor | |
| Viola tricolor x arvensis = V. x contempta | |
| Viscum album | Mistletoe |
| Vitis coignetiae | Crimson-Glory-Vine |
| Vitis vinifera | Grape-Vine |
| Vittadinia triloba | Fuzzweed |
| Volutaria lippii | |
| Vulpia alopecuros | |
| Vulpia australis | |
| Vulpia bromoides | Squirreltail Fescue |
| Vulpia ciliata | Bearded Fescue |
| Vulpia ciliata ssp. ambigua | |
| Vulpia ciliata ssp. ciliata | |
| Vulpia fasciculata | Dune Fescue |
| Vulpia geniculata | |
| Vulpia membranacea | |
| Vulpia muralis | |
| Vulpia myuros | Rat's-tail Fescue |
| Vulpia sicula | |
| Vulpia unilateralis | Mat-grass Fescue |
| Vulpiella tenuis | |
| Wahlenbergia hederacea | Ivy-Leaved Bellflower |
| Wahlenbergia lobelioides | |
| Wahlenbergia nutabunda | |
| Wahlenbergia trichogyna | |
| Waldsteinia fragarioides | |
| Waldsteinia ternata | |
| Wangenheimia lima | |
| Watsonia beatricis | Beatrice Watsonia |
| Watsonia borbonica | Bugle-lily |
| Watsonia borbonica ssp. ardernei | |
| Weigela florida | Weigelia |
| Weigela japonica | |
| Wiedemannia orientalis | |
| Wisteria floribunda | |
| Wisteria sinensis | Chinese Wisteria |
| Wisteria venusta | |
| Wolffia arrhiza | Rootless Duckweed |
| Woodsia alpina | Alpine Woodsia |
| Woodsia ilvensis | Oblong Woodsia |
| Woodwardia radicans | Chain Fern |
| X Agropogon lutosus | Perennial Beard-grass |
| Xanthium ambrosioides | Argentine Cocklebur |
| Xanthium spinosum | Spiny Cocklebur |
| Xanthium strumarium | Rough Cocklebur |
| Xanthocyparis nootkatensis | Nootka Cypress |
| Xeranthemum annuum | Immortelle |
| Xeranthemum cylindraceum | |
| Xeranthemum inapertum | |
| Yucca filamentosa | Adam's-needle |
| Yucca gloriosa | Spanish Dagger |
| Yucca recurvifolia | Curved-leaved Spanish-dagger |
| Yucca rupicola | Twisted-leaf Spanish-dagger |
| Yushania anceps | Indian Fountain-bamboo |
| Zannichellia palustris | Horned Pondweed |
| Zannichellia palustris ssp. palustris | |
| Zannichellia palustris ssp. pedicellata | |
| Zantedeschia aethiopica | Altar-lily |
| Zauschneria californica | Californian Fuchsia |
| Zea mays | Maize |
| Zelkova carpinifolia | Caucasian Elm |
| Zelkova serrata | Japanese Elm |
| Zenobia pulverulenta | Zenobia |
| Zingeria biebersteiniana | |
| Zingeria pisidica | |
| Zinnia elegans | Youth-and-age |
| Zinnia peruviana | |
| Zizania latifolia | Manchurian Wildrice |
| Ziziphora capitata | |
| Ziziphora clinopodioides | |
| Ziziphora taurica | |
| Zoegea leptaurea | |
| Zostera marina | Eelgrass |
| Zostera noltei | Dwarf Eelgrass |
| Zygophyllum fabago | Syrian Bean-caper |
| BOTANICAL NAME | VERNACULAR NAME |