Carex arcta Boott
northern clustered sedge (northern cluster sedge)
Cyperaceae (Sedge family)

Introduction to Vascular Plants

Photograph

© Jamie Fenneman     (Photo ID #25644)


Map

E-Flora BC Static Map

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

Species Information

General:
Perennial, somewhat tufted herb from elongate fibrous roots; stems 25-60 cm tall, about as long as the leaves.
Leaves:
Sheaths tight; blades numerous, borne on the lower part of the stem, 1.5-4 mm wide, flat.
Flowers:
Spikes 5 to 15 in a 3- to 5-cm long, dense, cylindrical or narrowly egg-shaped head, occasionally with a few spikes separate below, many-flowered, 5-8 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, 2.2-3.5 mm long, 0.8-1 mm wide, green, dark green or brownish, minutely whitish-dotted, plano-convex, smooth, obscurely ribbed, especially above, unstalked, the beaks about 1 mm long, minutely sharp-toothed, shallowly cleft; female scales egg-shaped, covering about 1/2 of the perigynia, pointed, nearly colourless to brownish, with green midribs; stigmas 2; achenes lens-shaped, 1.2-1.7 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 arcta

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)
866 238 2040
Slope Gradient (%)
4 0 50

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

106 20 225
Soil Moisture Regime (SMR)
[0 - very xeric; 4 - mesic;
8 - hydric]
6 3 7
Modal Nutrient Regime
Class
D
# of field plots
 species was recorded in:
29
Modal BEC Zone Class
CWH

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

CWH(9), ESSF(1), ICH(3), IDF(1), IMA(2), MH(1), MS(3), SBS(5)

Habitat and Range

Moist to wet meadows, fens, marshes, ditches and clearings in the lowland, steppe and montane zones; common in S BC; N to AK, YT and NT, E to Labr. and NB, and S to MA, NY, MI, WI, MN, ID and CA.

SourceThe Illustrated Flora of British Columbia