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

Carex crawei Dewey
Crawe's sedge
Cyperaceae (Sedge family)

Introduction to Vascular Plants

© Bryan Kelly-McArthur  Email the photographer   (Photo ID #70769)

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Distribution of Carex crawei
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Species Information

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General:
Perennial herb from slender, long-creeping rhizomes; stems solitary or few, 10-30 (40) cm tall, exceeding the leaves.
Leaves:
Sheaths tight, translucent towards the stems; blades 6 to 12 per stem, flat or nearly so, gradually tapering to the tips, 1.5-3 mm wide.
Flowers:
Spikes 3 to 5, the terminal one lanceolate, 1-3 cm long, with male flowers, the lower 2 to 4 spikes cylindrical, 1-3 cm long, remote, long-stalked below, short-stalked above, with female flowers, erect; bracts subtending the female spikes leaflike, 2 to 3 times the length of the spikes, sheathing, the sheaths 5-15 mm long.
Fruits:
Perigynia elliptical or broadly egg-shaped, 2.5-3.5 mm long, 1.3-2 mm wide, reddish-brown, the margins translucent, the centres greenish, plano-convex, smooth, obscurely 15- to 35-nerved, crowded, erect to ascending, unstalked, the beaks slightly bidentate, 0.2-0.4 mm long; female scales broadly egg-shaped, yellowish-green to reddish-brown with translucent margins and green centres, narrower and 1/2 the length of the perigynia; stigmas 3; achenes 3-angled, 1.7-2 mm long.

Source: The Illustrated Flora of British Columbia

Habitat / Range

Moist to wet calcareous meadows and marl fens in the montane zone; rare in SE BC; E to PQ and NB and S to ME, VA, GA, AR, OK, CO, UT and WA.

Source: The Illustrated Flora of British Columbia

Ecology

Ecological Framework for Carex crawei

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) 1640 1640 1640
Slope Gradient (%) 7 7 7
Aspect (degrees)
[0 - N; 90 - E; 180 - S; 270 - W]
315 315 315
Soil Moisture Regime (SMR)
[0 - very xeric; 4 - mesic;
8 - hydric]
4 4 4
Modal Nutrient Regime
Class
Number of field plots
 species was recorded in:
1
Modal BEC Zone Class
All BEC Zones (# of stations/zone) species was recorded in:

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 montane boreal & cool temperate.

Taxonomic and Nomenclatural Links

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General References