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)

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Distribution of Carex douglasii
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Species Information

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General:
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.
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.
Flowers:
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.
Fruits:
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:
Green
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

Ecology

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

Minimum

Average

Maximum

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
Class
D
Number of field plots
 species was recorded in:
11
Modal BEC Zone Class
SBS
All BEC Zones (# of stations/zone) species was recorded in: BG(1), BWBS(1), IDF(1), PP(1), SBPS(1), SBS(1)

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 not evaluated, unknown or variable.

Taxonomic and Nomenclatural Links

Additional Photo Sources

General References