Carex obtusata Lilj.
blunt sedge (obtuse sedge)
Cyperaceae (Sedge family)

Introduction to Vascular Plants

Photograph

© Curtis Bjork     (Photo ID #24977)


Map

E-Flora BC Static Map

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

Species Information

General:
Perennial herb from slender, creeping, purple-black rhizomes; stems 5-20 cm tall, longer than the leaves, arising singly or a few together.
Leaves:
Sheaths tight, blunt at the mouths; blades 4 to 8 per stem, channeled, borne near the base, 1-1.5 mm wide, the lower ones persisting.
Flowers:
Spikes solitary, linear at first, expanding below at maturity, with both female and male flowers, the upper 2/3 of the spike consisting of male flowers, the female flowers below, 5-15 mm long, 3-6 mm wide, erect; bractless.
Fruits:
Perigynia few, egg-shaped, 3-4 mm long, 1.5-2 mm wide, glossy, dark brown, obscurely to conspicuously ribbed, unstalked, the beaks translucent, 0.5-1 mm long, deeply bidentate; female scales narrowly egg-shaped, from slightly shorter than to slightly longer than the perigynia, sharp-pointed to short-awned, pale brown, the centres paler, the margins translucent; stigmas 3; achenes broadly 3-angled, 1-1.7 mm long.

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 obtusata

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)
1463 735 2156
Slope Gradient (%)
17 0 65

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

169 20 335
Soil Moisture Regime (SMR)
[0 - very xeric; 4 - mesic;
8 - hydric]
3 1 6
Modal Nutrient Regime
Class
C
# of field plots
 species was recorded in:
29
Modal BEC Zone Class
ESSF

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

BAFA(2), ESSF(9), IDF(7), MS(7), PP(1), SBS(1), SWB(1)

Habitat and Range

Dry rocky slopes, ridges and grasslands in the steppe to alpine zones; common in SC BC (Cariboo region), frequent in N BC; circumpolar, N to AK, YT and NT, E to W ON, and S to MN, SD, NM, UT and WA; Eurasia.

SourceThe Illustrated Flora of British Columbia