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

Carex limosa L.
shore sedge (bog sedge; mud sedge)
Cyperaceae (Sedge family)

Introduction to Vascular Plants

© Jamie Fenneman  Email the photographer   (Photo ID #29999)

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Distribution of Carex limosa
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Species Information

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Perennial herb from long, creeping rhizomes and rusty-reddish roots; stems 20-60 cm tall, arising singly or a few together, much longer than the leaves, usually reddish at the bases.
Sheaths tight, sometimes breaking into threads at the bases; blades 1 to 3 per stem, deeply channeled, borne on the lower 1/3 of the stem, 1-2 mm wide, the lower ones reduced.
Spikes 2 to 4, the terminal one linear, 1.5-2.7 cm long, long-stalked, with male flowers, the lower spikes 1 to 3, with female flowers, cylindrical, 1-2.5 cm long, slightly separate, long-stalked, nodding; bracts subtending the lowest spike leaflike, 2-10 cm long, sheathless or short-sheathing, shorter than the inflorescence, the others reduced.
Perigynia egg-shaped to elliptical, 2.3-4.2 mm long, 1.8-2 mm wide, green, somewhat compressed, densely pimpled, with 2 prominent marginal nerves and 4 to 7 other nerves on each face, short-stalked, beakless or short-beaked, the beaks cylindrical, 0.5-2 mm long; female scales egg-shaped to nearly globe-shaped, rounded to pointed or long-pointed, about as long as and as wide as the perigynia, light to dark brown, with lighter, 3-nerved centres; stigmas 3; achenes 3-angled, unstalked, smooth, 1.5-2.2 mm long.

Source: The Illustrated Flora of British Columbia

USDA Species Characteristics

Flower Colour:
Blooming Period:
Late Spring
Fruit/Seed characteristics:
Colour: Brown
Present from Spring to Summer
Source:  The USDA

Habitat / Range

Bogs, fens and shorelines in the lowland, montane and subalpine zones; frequent throughout BC except absent on the Queen Charlotte Islands; circumpolar, N to AK, YT and NT, E to NF and S to NJ, PA, OH, IN, IL, IA, NE, NM, UT, NV and CA; Iceland, Eurasia.

Source: The Illustrated Flora of British Columbia


Ecological Framework for Carex limosa

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) 7 1032 2110
Slope Gradient (%) 0 2 65
Aspect (degrees)
[0 - N; 90 - E; 180 - S; 270 - W]
2 352 350
Soil Moisture Regime (SMR)
[0 - very xeric; 4 - mesic;
8 - hydric]
1 6 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: BAFA(3), BWBS(29), CWH(7), ESSF(73), ICH(40), IDF(16), MH(4), MS(30), SBPS(21), SBS(140), SWB(6)


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.

Taxonomic and Nomenclatural Links

Additional Photo Sources

General References