General: Perennial, densely tufted herb from fibrous roots, sometimes from short, freely rooting rhizomes that connect the tufts; stems quite circular in cross-section, tapered, smooth, 10-40 cm tall.
Leaves: More or less reduced, scalelike, light brown at the base of the stem with a single, more normally-developed leaf a little above the base, this leaf with typical sheath, but somewhat abnormal blade; sheaths straw-coloured to brownish, not cross-wrinkled; blades slender, short, 4-6 mm long.
Flowers: Spikes solitary, terminal, medium to light brown, 4-6 mm long, 2- to 4-flowered; involucral bracts lacking.
Fruits: Scales 2 or 3, yellowish-brown, egg-shaped, pointed to minutely abruptly sharp-pointed, empty at the base of the spikes (these often deciduous as the spikes approach maturity), the lowermost of these scales about as long as the spikes, with prominent, broad, blunt-tipped awns, 1-3 mm long and sometimes shortly surpassing the spikes; perianth bristles 6, white, or brownish near the tips, very fragile, hairlike, usually surpassing the achenes, but scarcely if at all, surpassing the scales; achenes brown, 3-angled, narrowly egg-shaped, about 1.5 mm long, abruptly sharp-pointed.
A very shade-intolerant, submontane to subalpine, circumpolar sedge (transcontinental in North America). Occurs predominantly on wet to very wet, nitrogen-poor soils (Mor humus forms) in boreal and cool temperate climates; their occurrence increases with increasing latitude. Sporadic in non-forested, semi-terrestrial communities on water-collecting sites; usually associated with Sphagnum species. An oxylophytic species characteristic of nutrient-poor wetlands.
Baeothryon caespitosum (L.) A. Dietr., orth. var. Baeothryon cespitosum (L.) A. Dietr. Scirpus caespitosus L., orth. var. Scirpus caespitosus var. austriacus (Pall.) Asch. & Graebn., orth. var. Scirpus caespitosus var. callosus Bigelow, orth. var. Scirpus caespitosus var. delicatulus Fernald, orth. var. Scirpus cespitosus L. Scirpus cespitosus var. austriacus (Pall.) Asch. & Graebn. Scirpus cespitosus var. callosus Bigelow Scirpus cespitosus var. delicatulus Fernald Trichophorum caespitosum (L.) Hartm., orth. var. Trichophorum caespitosum var. callosum (Bigelow) Mohlenbr., orth. var. Trichophorum cespitosum subsp. cespitosum
Recommended citation: Author, Date. Page title. In Klinkenberg, Brian. (Editor) 2020. E-Flora BC:
Electronic Atlas of the Plants of British Columbia [eflora.bc.ca]. Lab for
Advanced Spatial Analysis, Department of Geography, University of British
Columbia, Vancouver. [Accessed:
2021-05-12 5:12:42 PM
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