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

Carex geyeri Boott
elk sedge (Geyer's sedge)
Cyperaceae (Sedge family)

Introduction to Vascular Plants

© Ryan Batten  Email the photographer   (Photo ID #23797)

E-Flora BC Static Map
Distribution of Carex geyeri
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Species Information

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General:
Perennial, loosely tufted herb from branching rhizomes; stems 10-50 cm tall, equalling or shorter than the leaves.
Leaves:
Sheaths tight, blunt at the mouths, with short ligules; blades usually 2 per stem, flat, borne on the lower 1/3 of the stem, 1.5-3 mm wide, the margins rough.
Flowers:
Spikes solitary, with both female and male flowers, the male part linear with a few male flowers towards the tips, short-stalked above the 1 to 3, more or less remote, spreading female flowers, 15-25 mm long, 7-12 mm wide; bractless.
Fruits:
Perigynia egg-shaped, tapering to spongy bases, 5-7 mm long, 2.5-3.5 mm wide, greenish or brownish, smooth, 2-ribbed, abruptly short-stalked, the beaks short, scarcely bidentate; female scales lanceolate, longer and slightly wider than the perigynia, sharp-pointed or short-awned, greenish to brownish, the centres lighter, the margins broad, translucent; stigmas 3; achenes 3-angled, 3.5-4.5 mm long.

Source: The Illustrated Flora of British Columbia

USDA Species Characteristics

Flower Colour:
Yellow
Blooming Period:
Late Spring
Fruit/Seed characteristics:
Colour: Brown
Present from Spring to Summer
Source:  The USDA

Habitat / Range

Dry meadows and open forests in the montane to alpine zones; rare in SE BC; E to SW AB and S to CO, UT, NV and CA.

Source: The Illustrated Flora of British Columbia

Ecology

Ecological Framework for Carex geyeri

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) 534 1826 2394
Slope Gradient (%) 0 47 100
Aspect (degrees)
[0 - N; 90 - E; 180 - S; 270 - W]
20 169 325
Soil Moisture Regime (SMR)
[0 - very xeric; 4 - mesic;
8 - hydric]
1 2 5
Modal Nutrient Regime
Class
B
Number of field plots
 species was recorded in:
44
Modal BEC Zone Class
AT
All BEC Zones (# of stations/zone) species was recorded in: AT(18), ESSF(17), MS(7), PP(2)

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