MISCELLANEOUS
 SEX 
  DIOECIOUS
Asparagus (Garden)
Bog Myrtle
Broom (Butcher's)
Bryony (Black)
Bryony (White)
Buck's-beard
Buckthorn (Sea)
Butterbur
Butterbur (Giant)
Butterbur (White)
Buttonweed
Campion (Bladder)
Campion (Red)
Campion (White)
Cloudberry
Crowberry
Everlasting (Mountain)
Everlasting (Pearly)
Frogbit
Heliotrope (Winter)
Holly (Highclere) [Tree]
Holly [Tree]
Hop
Ivy (Poison)
Juniper (Common)
Laurel (Spotted)
Mercury (Annual)
Mercury (Dog's)
Mistletoe
Monkey-Puzzle [Tree]
Nettle (Fen)
Nettle (Stinging)
Palm (Chusan)
Parrot's Feather
Plantain (Buck's-horn)
Roseroot
Sandwort (Sea)
Saw-Wort
Saxifrage (Meadow)
Scabious (Devil's-bit)
Sorrel (Common)
Sorrel (Sheep's)
Valerian (Marsh)
Water Soldier
Waterweed (Curly)
Waterweed (Nuttall's)
Willow (Dwarf)
Yew
Honewort (the only dioecious umbellifer)
Hairless Leptinella
Buckthorn aka Purging Buckthorn (but not Alder Buckthorn)
Bay Laurel
All Willows
Ash Trees
Box Elder
Acer (Sycamore/Maple/etc)
Tree of Heaven
Smoke Bush (Cotinus)
Honey Locust (Gleditsia)
Junipers
Poplar Trees (Populus - Poplar / Aspen)
Bayberry (Myrica)
Podocarpus spp.
Yew Trees (Taxus)
Prickly Ash (Zanthophylum)
Hemp (Cannabis)
Dioecious Amaranth
Dioecious Sedge
Tree Groundsell (Baccaris halimifolia)
Katsura (Cerciphyllum japonicum
Maidenhair Tree (Ginko biloba)
Date (Phoenix dactylifera)
Sedges
Thistle (Creeping) [normally]
Spinach (Spinacia oleracea)
Yams
  MONOECIOUS
Arrowhead
Bur-reed (Branched)
Bur-reed (Unbranched)
Chestnut (Sweet)
Fir (Korean)
Hemlock (Western)
Larch (Dahurian)
Larch (European)
Larch (Japanese)
Nettle (Small)
Oak (Pedunculate)
Sedge (Cyperus)
Sedge (False Fox)
Sedge (Glaucous)
Sedge (Remote)
Spruce (Brewer)
Sedge (Star)
Arrowheads
Abies - Fir
Alnus - Alder
Betula - Birch
Carpinus - Hornbeam, Ironwood
Castanea - Sweet Chestnut
Carya- Hickory
Cedrus - Cedar
Chamaecyparis - False Cypress
Corylus - Hazelnut
Cryptomeria
Cucumber
Cunninghamia
Cupressus - Cypress
Fagus - Beech
Ficus - Fig
Juglans - Walnut
Keteleeria
Larix - Larch
Melon
Ostrya- Hop Hornbeam
Picea - Spruce
Pinus - Pine
Platanus - Sycamore, Plane Tree
Pseudolarix - Golden Larch
Pseudotsuga - Douglas Fir
Quercus - Oak
Sciadopitys - Umbrella Pine
Sequoia - Coastal Redwood
Sequoiadendron - Giant Redwood
Annual Sea-purslane/Pedunculate Sea-purslane
Taxodium - Bald Cypress
Thuja - Arborvitae
Tsuga- Hemlock
Walnut
Sedges
  MALE
Elm (Wych)
Giant Rhubarb (Brazilian)
Giant Rhubarb (Chilean)
Water-Milfoil (Alternate)
Water-Milfoil (Whorled)
Japanese Knotweed (the pure non-hybrid)
  FEMALE
Elm (Wych)
Giant Rhubarb (Brazilian)
Giant Rhubarb (Chilean)
Pellitory of the Wall
Plantain (Buck's-horn)
Seablite (Annual)
Water-Milfoil (Alternate)
Water-Milfoil (Whorled)
Japanese Knotweed (hybrid)
  OR  UNISEXUAL
Orache (Babington's)
Orache (Common)
Atriplex × hulmeana
Orache (Kattegat)
Orache (Long-Stalked)
Orache (Spear-Leaved)
  BISEXUAL
LIST VERY INCOMPLETE
most plants are bisexual!
Avens (Mountain)
Barberry
Barberry (Darwin's)
Barberry (Chinese)
Barberry (Thunberg's)
Buckthorn (Alder)
Deergrass (Northern)
Elm (Wych)
Giant Rhubarb (Brazilian)
Giant Rhubarb (Chilean)
Moschatel
Pellitory of the Wall
Plantain (Buck's-horn)
Sandwort (Three-Nerved)
Seablite (Annual)
Water-Milfoil (Alternate)
Water-Milfoil (Whorled)
  (Pin/Thrum) HETEROSTYLOUS
Flax (Cultivated)
Loosestrife (Purple)
Primrose
Primrose (Birdseye)
Violet (Water)
Buttercup (Bermuda)
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