E-Flora BC: Electronic Atlas of the Flora of British Columbia

Eriophorum viridicarinatum (Engelm.) Fernald
green-keeled cotton-grass (thinleaf cottonsedge)
Cyperaceae (Sedge family)

Introduction to Vascular Plants

© Bryan Kelly-McArthur  Email the photographer   (Photo ID #74474)

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Distribution of Eriophorum viridicarinatum
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Species Information

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General:
Perennial herb from thin rhizomes; stems 30-100 cm tall.
Leaves:
Mainly basal, flat except at the tips, stem leaves 2 or more; sheaths green, the basal, persistent ones brownish, cross-wrinkled; blades 2-6 mm wide, flat, except at the tips, the uppermost equalling or surpassing the sheaths.
Flowers:
Spikes 4 to 10, terminal, loosely aggregated, usually stalked, the stalks pendulous, to 5 cm long, slender, rough, short-hairy, or rarely all unstalked, egg-shaped, 0.6-1 cm long in flower, 1.5-3 cm long in fruit; anthers 1-1.3 mm long; involucral bracts 2 to 3, green with light brown bases, usually the longest ones surpassing the inflorescence.
Fruits:
Scales blackish-green, narrowly egg-shaped, appressed to ascending, 1-ribbed, blunt, the conspicuous, paler midribs expanded at, and extending to the tips; perianth bristles numerous, creamy-white to tawny, many times longer than the achenes; achenes narrowly egg-shaped, 3-4 mm long.

Source: The Illustrated Flora of British Columbia

Habitat / Range

Bogs, marshes and wet meadows in the montane to alpine zones; frequent in NW and E BC, infrequent in SC BC; N to AK and YT, E to NF and S to NY, IA, OH, MI, CO and ID.

Source: The Illustrated Flora of British Columbia

Ecology

Ecological Framework for Eriophorum viridicarinatum

The table below shows the species-specific information calculated from
original data (BEC database) provided by the BC Ministry of Forests and Range.
(Updated August, 2013)

Site Information
Value / Class

Minimum

Average

Maximum

Elevation (metres) 380 791 1440
Slope Gradient (%) 0 2 55
Aspect (degrees)
[0 - N; 90 - E; 180 - S; 270 - W]
60 85 338
Soil Moisture Regime (SMR)
[0 - very xeric; 4 - mesic;
8 - hydric]
3 6 8
Modal Nutrient Regime
Class
C
Number of field plots
 species was recorded in:
47
Modal BEC Zone Class
SBS
All BEC Zones (# of stations/zone) species was recorded in: BWBS(8), CWH(1), ESSF(1), ICH(8), IDF(1), MH(1), MS(3), SBPS(1), SBS(19)

Climate

The climate type for this species, as reported in the: "British Columbia plant species codes and selected attributes. Version 6 Database" (Meidinger et al. 2008), is not evaluated, unknown or variable.

Synonyms and Alternate Names

Eriophorum polystachion var. viridicarinatum

Taxonomic and Nomenclatural Links

Additional Photo Sources

Related Databases

General References