Trichophorum pumilum

(Vahl) Schinz & Thellung

Vierteljahrsschr. Naturf. Ges. Zürich 66: 265. 1921.

Common names: Trichophore nain
Basionym: Scirpus pumilus Vahl Enum. Pl. 2: 243. 1805
Synonyms: Baeothryon pumilum (Vahl) Á. Löve & D. Löve Scirpus alpinus Schleicher ex Gaudin Scirpus emergens (Norman) Fernald Scirpus pumilus subsp. rollandii (Fernald) Raymond Scirpus pumilus var. rollandii (Fernald) Beetle Scirpus rollandii Trichophorum emergens Trichophorum pumilum var. rollandii (Fernald) Hultén
Treatment appears in FNA Volume 23. Treatment on page 30. Mentioned on page 29.

Plants loosely cespitose; rhizomes long, slender. Culms grooved, terete, 5–14 cm, smooth. Leaves: basal sheaths brown; distal leaf sheaths truncate to concave at mouth; blades 2–8.4 × 0.4–0.5 mm, much shorter than culms at flowering and fruiting. Inflorescences: spikelets 3–6-flowered, 3–4.6 × 1.7–2.8 mm; bracts shorter than spikelets, 1.6–2.5 mm, apex mucronate. Spikelets: scales brown, apex obtuse. Flowers: perianth bristles absent; anthers 0.8–1.5 mm. Achenes compressed trigonous to plano-convex, (1.2–)1.4–1.9 × 0.8–1.2 mm.

Phenology: Fruiting summer (Jul–Aug).
Habitat: Moist to wet coniferous swamps, bogs, riverbanks, calciphile
Elevation: 20–1500 m [3500 m, Nepal]


V23 39-distribution-map.jpg

Alta., B.C., N.W.T., Que., Sask., Yukon, Alaska, Calif., Mont., Europe, c Asia.


North American plants have been distinguished as Trichophorum pumilum var. rollandii (Fernald) Beetle; differences from the Eurasian plants are elusive. The chromosome number in Europe is 2n = 78.

Selected References


Lower Taxa

... more about "Trichophorum pumilum"
William J. Crins +
(Vahl) Schinz & Thellung +
Scirpus pumilus +
Trichophore nain +
Alta. +, B.C. +, N.W.T. +, Que. +, Sask. +, Yukon +, Alaska +, Calif. +, Mont. +, Europe +  and c Asia. +
20–1500 m [3500 m, Nepal] +
Moist to wet coniferous swamps, bogs, riverbanks, calciphile +
Fruiting summer (Jul–Aug). +
Vierteljahrsschr. Naturf. Ges. Zürich +
Illustrated +
Baeothryon pumilum +, Scirpus alpinus +, Scirpus emergens +, Scirpus pumilus subsp. rollandii +, Scirpus pumilus var. rollandii +, Scirpus rollandii +, Trichophorum emergens +  and Trichophorum pumilum var. rollandii +
Trichophorum pumilum +
Trichophorum +
species +