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

Carex eburnea Boott
bristle-leaved sedge (bristleleaf sedge)
Cyperaceae (Sedge family)

Introduction to Vascular Plants

© Bryan Kelly-McArthur  Email the photographer   (Photo ID #85519)

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Distribution of Carex eburnea
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Species Information

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General:
Perennial, tufted herb from long rhizomes; stems 10-35 cm tall, arising singly or a few together, longer than the leaves, reddish-tinged at the bases.
Leaves:
Sheaths tight; blades 3 to 6 per stem, in-rolled, smooth, borne on the lower 1/3 of the stems, less than 0.5 mm wide, the lower ones slightly reduced.
Flowers:
Spikes 3 to 5, the terminal one stalked, 4-8 mm long, with male flowers, the lower spikes 2 to 4, erect, 2- to 6-flowered, with female flowers, long-stalked, the stalks 6-15 mm long; bracts subtending the female spikes tubular-sheathing, 4-6 mm long, bladeless.
Fruits:
Perigynia egg-shaped to elliptical, 1.7-2 mm long, 0.7-1 mm wide, 3-angled, membranaceous, dark green to black, shining, finely nerved, 2-ribbed, smooth, the beaks short, cylindrical, 0.2-0.3 mm long, translucent at the tips; female scales egg-shaped and pointed to rounded at the tips, shorter than the perigynia, whitish to yellowish-green or pale brown, with greenish midribs and translucent margins; stigmas 3; achenes 3-angled, with thicker angles and concave sides, sharp-pointed, smooth, 1.2-1.4 mm long.

Source: The Illustrated Flora of British Columbia

Habitat / Range

Dry, often calcareous, gravelly or rocky sites in the montane zone; frequent throughout E BC (Rocky Mountains); N to AK, YT and NT, E to NF and S to ME, PA, NC, GA, AL, TX and CO.

Source: The Illustrated Flora of British Columbia

Ecology

Ecological Framework for Carex eburnea

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) 664 1034 1324
Slope Gradient (%) 0 6 45
Aspect (degrees)
[0 - N; 90 - E; 180 - S; 270 - W]
30 255 320
Soil Moisture Regime (SMR)
[0 - very xeric; 4 - mesic;
8 - hydric]
0 3 6
Modal Nutrient Regime
Class
E
Number of field plots
 species was recorded in:
18
Modal BEC Zone Class
MS
All BEC Zones (# of stations/zone) species was recorded in: BWBS(3), IDF(3), MS(5), SWB(1)

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.

Taxonomic and Nomenclatural Links

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General References