Family: Sedge Club- & Spike-Rush [Cyperaceae]


Blysmus

Bolboschoenus

Carex

Cladium

Cyperus

Eleocharis

Eleogiton

Eriophorum

Isolepis

Kobresia

Rhynchospora

Schoenoplectus

Schoenus

Scirpoides

Scirpus

Scleria

Trichophorum



[CYPERUS] Galingales

Galingale (Cyperus longus) Photo: © RWD



[CAREX] Sedges (and Club-rushes and Spike-rushes).

Almost all true sedges have separate male and female catkins, but both on the same plant - that is, they are monoecious. Meaning, un-like grasses, the florets themselves are not bisexual. The single stem is triangular in cross-section, with its exact shape (edges flat, concave or convex; corners sharp or rounded) and whether it is hollow or not, and if so, the size and shape of the hollow tube within (whether round, triangularish, large, medium, or small diameter) of great importance in identification. The other important characteristics is whether the ovaries have two or three styles, and the exact shape and size of the ovaries and whether they are beaked or not. Also dignostic is the number of stigmas; whether two or three. The shape and spacing of the two brown bracts (looking like shields) on the side of the ovaries, and the shape of the separating space (the sinus) between the bracts can all help pin down the ID.

 

SEDGE HYBRID CHARTS (shrunk)
POPULATION 1 Hybrid Chart: SEDGES population 1 (larger)

POPULATION 2 Hybrid Chart: SEDGES population 2 (larger)

POPULATION 3 Hybrid Chart: SEDGES population 3 (larger)

The hybrid charts of the Sedges is very large and un-weildy, so the Author has split it up into three separate non-overlapping populations to make the graphs smaller. This also has the added benefit of aiding the visualisation of those species which are inter-related, as opposed to those which may not now be as closely related. Your Author does not know whether, or not, these three separate non-hybridising populations (or at least not in the UK) have any meaning in the real world; he leaves that to taxonomists. Surely your Author is not the first person to spot this?

Carex SPECIES LACKING HYBRIDS
(Carex arenaria) Sand Sedge
(Carex atrata) Black Alpine-sedge
(Carex atrofusca) Scorched Alpine-sedge
(Carex brunnea)
(Carex buchananii) Silver-spiked Sedge
(Carex buxbaumii) Club Sedge
(Carex canescens) White Sedge
(Carex capillaris) Hair Sedge
(Carex capitata)
(Carex caryophyllea) Spring Sedge
(Carex chordorrhiza) String Sedge
(Carex comans) New Zealand Hair Sedge
(Carex crawfordii)
(Carex davalliana) Davall's Sedge
(Carex demissa) Common Yellow-sedge
(Carex depauperata) Starved Wood-sedge
(Carex digitata) Fingered Sedge
(Carex disticha) Brown Sedge
(Carex divisa) Divided Sedge
(Carex divulsa subsp. leersii) Grey Sedge
(Carex elongata) Elongated Sedge
(Carex ericetorum) Rare Spring-sedge
(Carex filiformis) Downy-fruited Sedge
(Carex flacca) Glaucous Sedge
(Carex humilis) Dwarf Sedge
(Carex lachenalii) Hare's-foot Sedge
(Carex lepidocarpa) Long-stalked Yellow-sedge
(Carex leporina) Oval Sedge
(Carex limosa) Bog-sedge
(Carex magellanica) Tall Bog-sedge
(Carex maritima) Curved Sedge
(Carex microglochin) Bristle Sedge
(Carex montana) Soft-leaved Sedge
(Carex muricata subsp. muricata) Large-fruited Prickly-sedge
(Carex norvegica) Close-headed Alpine-sedge
(Carex oederi) Small-fruited Yellow-sedge
(Carex ornithopoda) Bird's-foot Sedge
(Carex panicea) Carnation Sedge
(Carex pauciflora) Few-flowered Sedge
(Carex pendula) Pendulous Sedge
(Carex pilulifera) Pill Sedge
(Carex pulicaris) Flea Sedge
(Carex rariflora) Mountain Bog-sedge
(Carex rupestris) Rock Sedge
(Carex strigosa) Thin-spiked Wood-sedge
(Carex sylvatica) Wood-sedge
(Carex vaginata) Sheathed Sedge
(Carex vulpina) True Fox-sedge
(Carex vulpinoidea) American Fox-sedge

Star Sedge (Carex echinata) Photo: © RWD

False Fox Sedge (Carex otrubae) Photo: © RWD

Glaucous Sedge (Carex flacca) Photo: © RWD

Pendulous Sedge (Carex pendula) Photo: © RWD

Remote Sedge (Carex remota) Photo: © RWD

Cyperus Sedge (Carex pseudocyperus) Photo: © RWD



[BOLBOSCHOENUS] Sea Club-Rush

Sea Club-Rush (Bolboschoenus maritimus) Photo: © RWD



[ERIOPHORUM] Cotton-Grasses

Hare's-Tail Cotton-Grass (Eriophorum vaginatum) Photo: © RWD

Common Cotton-Grass (Eriophorum angustifolium) Photo: © RWD



[TRICHOPHORUM] Deergrasses

Northern Deergrass (Trichophorum cespitosum) Photo: © RWD

Family: Sedge, Club- & Spike-Rush [Cyperaceae]

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