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

Carex petasata Dewey
pasture sedge (broad-wing sedge; Liddon sedge)
Cyperaceae (Sedge family)

Introduction to Vascular Plants

© Jamie Fenneman  Email the photographer   (Photo ID #17151)

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Distribution of Carex petasata
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Species Information

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Perennial, tufted herb from fibrous roots; stems 30-80 cm tall, well exceeding the leaves.
Sheaths tight; blades flat, 2-3 mm wide, borne on the lower 1/3 of the stem.
Spikes 4 to 6, aggregated into an elongated, 2-4 cm long head, unstalked, with both female and male flowers, the female ones towards the tips; bracts subtending the spikes sheathless, scalelike, the lowermost one occasionally prolonged.
Perigynia lanceolate or narrowly egg-shaped, 6-8 mm long, 2-2.3 mm wide, light green to straw-coloured or brownish, more or less flattened, the margins winged nearly to the bases, the upper 1/2 fringed with teeth, many-nerved on both sides, with spongy bases, the beaks 2-3 mm long, bidentate, broadly-margined, toothed below; female scales egg-shaped, brownish, with green centres, with translucent margins, somewhat shorter and narrower than the perigynia, short-awned; stigmas 2; achenes lens-shaped, 2.5-3 mm long.

Source: The Illustrated Flora of British Columbia

Habitat / Range

Dry to moist meadows, grassy slopes and open forests in the steppe and montane zones; common in SC BC, less frequent elsewhere E of the Coast-Cascade Mountains, the Queen Charlotte Islands and the adjacent mainland; N to SW YT, E to SW SK and S to NM, AZ and OR.

Source: The Illustrated Flora of British Columbia


Ecological Framework for Carex petasata

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) 170 1030 2410
Slope Gradient (%) 0 23 360
Aspect (degrees)
[0 - N; 90 - E; 180 - S; 270 - W]
9 174 360
Soil Moisture Regime (SMR)
[0 - very xeric; 4 - mesic;
8 - hydric]
0 3 7
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: AT(1), BAFA(1), BG(30), BWBS(2), ESSF(16), ICH(1), IDF(61), MS(9), PP(18), SBS(10), SWB(5)


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

Carex liddonii

Taxonomic and Nomenclatural Links

Additional Photo Sources

General References