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

Carex anthoxanthea J. Presl & C. Presl
yellow-flowered sedge (grassyslope arctic sedge)
Cyperaceae (Sedge family)

Introduction to Vascular Plants

© Ryan Batten  Email the photographer   (Photo ID #25798)

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Distribution of Carex anthoxanthea
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Species Information

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Perennial herb from creeping rhizomes; stems 5-40 cm tall, equalling the leaves or nearly so, roughened above.
Sheaths short, greenish-whitish; blades 2 to 4 from near the base, flat, 1-2 mm wide, the lower ones lacking or reduced, roughened at the tips.
Spikes solitary, with both female and male flowers, the male flowers towards the tips, 1-3 cm long, 2-3 mm wide, erect; bract subtending the spike lacking.
Perigynia lanceolate to narrowly elliptical, 3.8-4.2 mm long, 1.3-1.6 mm wide, yellowish-green to straw-coloured, obscurely compressed-triangular, smooth, many-nerved, the beaks about 1 mm long; female scales lanceolate, shorter or longer than the perigynia, the lower ones awn-tipped, the upper ones round-tipped, dark brown with 1- to 3-nerved green centres; stigmas 3, rarely 2; achenes 3-angled, granular, 1.3-1.5 mm long.

Source: The Illustrated Flora of British Columbia

Habitat / Range

Fens, bogs and bog forests from the montane to subalpine zones; frequent in coastal BC, rare in NW BC; amphiberingian, N to AK, YT and NT, S to WA; E Asia.

Source: The Illustrated Flora of British Columbia


Ecological Framework for Carex anthoxanthea

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) 2 457 2120
Slope Gradient (%) 0 22 120
Aspect (degrees)
[0 - N; 90 - E; 180 - S; 270 - W]
0 63 360
Soil Moisture Regime (SMR)
[0 - very xeric; 4 - mesic;
8 - hydric]
0 5 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(3), BAFA(3), BWBS(1), CMA(6), CWH(143), ESSF(15), MH(41), PP(1), SWB(1)

Ecological Indicator Information

A shade-intolerant, submontane to subalpine, Asian and Western North American sedge distributed more in the Pacific than the Cordilleran region. Occurs in boreal and hypermaritime to maritime cool mesothermal climates on wet to very wet, nutrient-medium soils. Its occurrence decreases with increasing elevation and continentality. Common in non-forested, semi-terrestrial communities on water-collecting sites, occasional in open­canopy forests on seepage sites. Characteristic of wet forests and wetlands.

SourceIndicator Plants of Coastal British Columbia (Information applies to coastal locations only)


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 subalpine boreal & cool mesothermal.

Taxonomic and Nomenclatural Links

Additional Photo Sources

General References