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

Kobresia simpliciuscula (Wahlenb.) Mack.
simple kobresia (simple bog sedge)
Cyperaceae (Sedge family)

Introduction to Vascular Plants

© Adolf Ceska  Email the photographer   (Photo ID #20762)

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Distribution of Kobresia simpliciuscula
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Species Information

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Perennial, tufted herb from smooth fibrous roots; stems 7-35 (50) cm tall.
Sheaths brown to yellowish-brown, persistent, with conspicuous dried blades from the previous year at flowering time; blades linear, mostly 0.4-1.5 mm wide, either surpassing or shorter than the stem.
Inflorescence a narrow panicle, 1.5-4 cm long, mostly 3-8 mm wide, with 3 to 12, terminal, erect, 1.2- to 3-mm long, 0.4- to 1.1-mm wide spikes, the spikelets each usually with 1 male and 1 female flower, the male flower above the female flower; involucral bracts solitary, scalelike or leaflike and bristle-tipped.
Scales brownish, with broad, translucent margins; stigmas 3; achenes compressed, 3-angled, 2.3-3 mm long.

Source: The Illustrated Flora of British Columbia

Habitat / Range

Bogs, wet meadows and shallow ponds in the montane and subalpine zones; infrequent in extreme N BC; circumpolar, N to AK, YT and NT, E to NF and S to CO, UT, ID and OR; Eurasia.

Source: The Illustrated Flora of British Columbia


Ecological Framework for Kobresia simpliciuscula

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




Elevation (metres) 676 1419 2330
Slope Gradient (%) 0 17 38
Aspect (degrees)
[0 - N; 90 - E; 180 - S; 270 - W]
170 222 352
Soil Moisture Regime (SMR)
[0 - very xeric; 4 - mesic;
8 - hydric]
2 3 8
Modal Nutrient Regime
Number of field plots
 species was recorded in:
Modal BEC Zone Class
All BEC Zones (# of stations/zone) species was recorded in: AT(1), BAFA(4), BWBS(2), IDF(1), PP(1)


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.

Synonyms and Alternate Names

Carex bipartita All.
Kobresia bipartita (All.) Dalla Torre
Kobresia simpliciuscula var. americana Duman

Taxonomic and Nomenclatural Links

Additional Photo Sources

General References