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

Introduction to Vascular Plants


© Jamie Fenneman     (Photo ID #17151)


E-Flora BC Static Map

Distribution of Carex petasata
Click here to view the full interactive map and legend

Species Information

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.

SourceThe Illustrated Flora of British Columbia


If more than one illustration is available for a species (e.g., separate illustrations were provided for two subspecies) then links to the separate images will be provided below. Note that individual subspecies or varietal illustrations are not always available.


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)
1030 170 2410
Slope Gradient (%)
23 0 360

Aspect (degrees)
[0 - N; 90 - E; 180 - S; 270 - W]

174 9 360
Soil Moisture Regime (SMR)
[0 - very xeric; 4 - mesic;
8 - hydric]
3 0 7
Modal Nutrient Regime
# 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)

Habitat and 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.

SourceThe Illustrated Flora of British Columbia


Synonyms and Alternate Names:
Carex liddonii