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

Carex tribuloides Wahlenb. var. tribuloides
blunt broom sedge
Cyperaceae (Sedge family)

Introduction to Vascular Plants
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E-Flora BC Static Map
Distribution of Carex tribuloides var. tribuloides
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Species Information

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Perennial, tufted herb from fibrous roots; stems 50-90 cm tall, exceeding the leaves.
Sheaths tight; blades flat, 2.5-7 mm wide, borne along the stems, the lower ones strongly reduced.
Spikes 6 to 15, aggregated into an elongated head 2-5 cm long, unstalked, with both female and male flowers, the female ones towards the tips; bracts subtending the spikes sheathless, reduced, inconspicuous.
Perigynia narrowly lanceolate, 3-5 mm long, 1-1.5 mm wide, pale green or straw-coloured, more or less flattened, distended over the achenes, the margins winged nearly to the bases, the upper 1/2 fringed with teeth, lightly several-nerved on both sides, the beaks shallowly bidentate, 1-1.2 mm long, narrowly margined and toothed below; female scales elliptical, pointed, brownish, with translucent margins, somewhat shorter and narrower than the perigynia; stigmas 2; achenes lens-shaped, 1.5 mm long.

Source: The Illustrated Flora of British Columbia

Habitat / Range

Moist to wet sites in the lowland zone, rare in the lower Fraser Valley; introduced from E North America.

Source: The Illustrated Flora of British Columbia


Ecological Framework for Carex tribuloides var. tribuloides

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




Elevation (metres) 530 784 1220
Slope Gradient (%) 0 2 15
Aspect (degrees)
[0 - N; 90 - E; 180 - S; 270 - W]
10 5 360
Soil Moisture Regime (SMR)
[0 - very xeric; 4 - mesic;
8 - hydric]
4 6 8
Modal Nutrient Regime
Number of field plots
 species was recorded in:
Modal BEC Zone Class
All BEC Zones (# of stations/zone) species was recorded in: BWBS(3), ICH(2), SBPS(1), SBS(4)

Taxonomic and Nomenclatural Links

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General References