Trichophorum cespitosum

(Linnaeus) Schur

Verh. Mitth. Siebenbürg. Vereins Naturwiss. Hermannstadt 4: 78. 1853.

Common names: Trichophore cespiteux
Basionym: Scirpus cespitosus Linnaeus Sp. Pl. 1: 48 1753
Synonyms: Baeothryon cespitosum (Linnaeus) A. Dietrich Scirpus bracteatus Bigelow Scirpus cespitosus var. callosus Bigelow Scirpus cespitosus var. delicatulus Fernald
Treatment appears in FNA Volume 23. Treatment on page 29.

Plants densely cespitose; rhizomes absent. Culms grooved, terete, 5–45 cm, smooth. Leaves: basal sheaths brown; distal leaf sheaths concave at mouth; blades 1.5–8 × 0.3–0.4 mm, much shorter than culms at flowering and fruiting. Inflorescences: spikelets 3–9-flowered, 3.3–7 × 1.2–3 mm; bracts equaling spikelets, 3.3–4.5 mm, apex with awn less than 1 mm. Spikelets: scales reddish brown to dark brown, apex mucronate to acute. Flowers: perianth bristles 6, brown, terete, equaling or exceeding achenes, smooth to scabrous; anthers 1.5–2.6 mm. Achenes compressed trigonous, 1.4–1.7 × 0.6–0.9 mm. 2n = 104.

Phenology: Fruiting summer (May–Aug).
Habitat: Open, wet, rocky or peaty meadows, fens, bogs, shores
Elevation: 0–2100 m


V23 38-distribution-map.jpg

Greenland, Alta., B.C., Man., N.B., Nfld. and Labr., N.W.T., N.S., Nunavut, Ont., P.E.I., Que., Sask., Yukon, Alaska, Idaho, Maine, Mont., N.H., N.Y., N.C., Oreg., S.C., Tenn., Utah, Vt., Wash., Europe, montane c Asia, boreal w Asia.


Segregates defined on the basis of characters such as the number of flowers per spike and distal leaf sheath morphology have been recognized at varietal or subspecific ranks in North America and Europe. In North America, at least, these characters are variable within populations and appear to have no geographic integrity. North American plants of Trichophorum cespitosum appear to be identical to subsp. cespitosum (cf. R. A. DeFilipps 1980). No cytological differences have been detected between European and North American populations; all counted plants have 2n = 104 or n = 52.

Lower Taxa

... more about "Trichophorum cespitosum"
William J. Crins +
(Linnaeus) Schur +
Scirpus cespitosus +
Trichophore cespiteux +
Greenland +, Alta. +, B.C. +, Man. +, N.B. +, Nfld. and Labr. +, N.W.T. +, N.S. +, Nunavut +, Ont. +, P.E.I. +, Que. +, Sask. +, Yukon +, Alaska +, Idaho +, Maine +, Mont. +, N.H. +, N.Y. +, N.C. +, Oreg. +, S.C. +, Tenn. +, Utah +, Vt. +, Wash. +, Europe +, montane c Asia +  and boreal w Asia. +
0–2100 m +
Open, wet, rocky or peaty meadows, fens, bogs, shores +
Fruiting summer (May–Aug). +
Verh. Mitth. Siebenbürg. Vereins Naturwiss. Hermannstadt +
fernald1921a +
Baeothryon cespitosum +, Scirpus bracteatus +, Scirpus cespitosus var. callosus +  and Scirpus cespitosus var. delicatulus +
Trichophorum cespitosum +
Trichophorum +
species +