Carex heleonastes L. f.
Hudson Bay sedge
Cyperaceae (Sedge family)

Introduction to Vascular Plants

Photograph

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Map

E-Flora BC Static Map

Distribution of Carex heleonastes
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Species Information

General:
Perennial, somewhat tufted herb from short rhizomes; stems 25-40 cm tall, bluntly triangular and rough below the inflorescence, longer than the leaves.
Leaves:
Sheaths tight; blades numerous, borne on the lower part of the stem, bluish-green, 1.5-2.5 mm wide, flat.
Flowers:
Spikes 4 to 6 in a 1-3 cm long, dense head, occasionally with a few spikes separate below, egg-shaped, many-flowered, 3-7 mm long, ascending, with both female and male flowers, the female flowers towards the tips, the male flowers inconspicuous; lowermost bract awnlike, about 0.5-2 cm long.
Fruits:
Perigynia egg-shaped, 2.5-3 mm long, 0.8-1 mm wide, green, dark green or brownish, minutely whitish-dotted, plano-convex, smooth, nerved, especially above, unstalked, the beaks about 0.5 mm long, bidentate; female scales egg-shaped, covering most of the perigynia, pointed, yellow-brown to reddish-brown, with green midribs; stigmas 2; achenes lens-shaped, 1.4-1.7 mm long, filling the perigynia.

SourceThe Illustrated Flora of British Columbia

Illustration

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.

Ecology

Ecological Framework for Carex heleonastes

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

Avg

Min

Max

Elevation (metres)
1794 1435 2115
Slope Gradient (%)
1 0 10

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

4 50 320
Soil Moisture Regime (SMR)
[0 - very xeric; 4 - mesic;
8 - hydric]
6 5 8
Modal Nutrient Regime
Class
D
# of field plots
 species was recorded in:
9
Modal BEC Zone Class
ESSF

All BEC Zones (# of stations/zone) species was recorded in

BAFA(1), ESSF(7), MS(1)

Habitat and Range

Bogs and fens in the montane zone; rare in BC east of the Coast-Cascade Mountains; circumpolar, N to AK, YT and NT, E to NF and S to MI; Eurasia.

SourceThe Illustrated Flora of British Columbia

Synonyms

Synonyms and Alternate Names:
Carex heleonastes subsp. heleonastes L. f.