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

Carex douglasii Boott
Douglas' sedge
Cyperaceae (Sedge family)

Introduction to Vascular Plants

© Ryan Batten  Email the photographer   (Photo ID #53032)

E-Flora BC Static Map
Distribution of Carex douglasii
Click here to view our interactive map and legend
Details about map content are available here
Click on the map dots to view record details.

Species Information

Click on the image below to view an expanded illustration for this species.

Perennial herb from slender, long-creeping rhizomes; stems 10-30 (40) cm tall, arising singly or a few together or sometimes matted, usually exceeding the leaves.
Sheaths tight, brownish or blackish at the bases; blades 3 to 8 per stem, in-rolled on the uppersides or sometimes flat, gradually tapering to the tips, 1-2.5 mm wide.
Spikes usually either male or female on separate plants, the male inflorescence with many aggregated spikes in a narrowly cylindrical to broadly egg-shaped head, the female inflorescence with many aggregated, but distinguishable, spikes in a cylindrical to nearly globe-shaped head, 1.5-5 cm long, unstalked; bracts of the lowest spike leaflike and longer than the spike, those above reduced and much like the scales.
Perigynia narrowly egg-shaped, 3.5-4.5 mm long, 1.6-1.9 mm wide, straw-coloured to brownish, smooth, obscurely many-nerved, crowded, erect, unstalked, the beaks bidentate, 1-1.5 mm long, finely toothed; female scales lanceolate, straw-coloured to light brown, with translucent margins and green centres, wider and longer than the perigynia; stigmas 2; achenes lens-shaped, 1.7-1.8 mm long.

Source: The Illustrated Flora of British Columbia

USDA Species Characteristics

Flower Colour:
Blooming Period:
Late Spring
Fruit/Seed characteristics:
Colour: Brown
Present over the Summer
Source:  The USDA

Habitat / Range

Moist to dry, often alkaline, meadows and grassy slopes in the steppe and montane zones; infrequent in SC and SE BC; E to S MB and S to MO, NE, NM, AZ and CA.

Source: The Illustrated Flora of British Columbia


Ecological Framework for Carex douglasii

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) 537 916 1450
Slope Gradient (%) 0 3 22
Aspect (degrees)
[0 - N; 90 - E; 180 - S; 270 - W]
150 77 360
Soil Moisture Regime (SMR)
[0 - very xeric; 4 - mesic;
8 - hydric]
1 5 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: BG(1), BWBS(1), IDF(1), PP(1), SBPS(1), SBS(1)


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

Additional Photo Sources

General References