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

Carex luzulina Olney
woodrush sedge
Cyperaceae (Sedge family)

Introduction to Vascular Plants

© Ryan Batten  Email the photographer   (Photo ID #25803)

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Distribution of Carex luzulina
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Carex luzulina var. ablata

Species Information

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Perennial, tufted herb from fibrous roots; stems 15-60 cm tall, much exceeding the leaves.
Sheaths blunt; blades flat, 3-9 mm wide, the lower ones slightly reduced.
Spikes 3 to 6, crowded, erect, 1-3 cm long, the upper unstalked, the lower short-stalked, the terminal one with male flowers, unstalked or nearly so, 1-2 cm long, the lower 2 to 5 spikes of female flowers, sometimes with male flowers towards the tips; bracts subtending the lowest spike with sheaths 1-4.5 cm long and blades 1-8 cm long, the blades much shorter than the inflorescence.
Perigynia lanceolate or narrowly egg-shaped, 3-5 mm long, 1-1.5 mm wide, smooth or often minutely rough, flattened, with 2 prominent nerves, the margins fringed with teeth near the tips, the beaks scarcely or shortly bidentate, about 1 mm long, 1/4 to 1/3 the length of the perigynia bodies; female scales egg-shaped, shorter than the perigynia, round at the tips, more or less fringed, purplish-black, the centres paler, the margins translucent; stigmas 3; achenes 3-angled, 1.4-1.7 mm long.

Source: The Illustrated Flora of British Columbia

USDA Species Characteristics

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

Habitat / Range

Moist meadows and bogs in the montane to alpine zones; locally frequent in SW BC; S to WY, UT, NV and CA.

Source: The Illustrated Flora of British Columbia


Ecological Framework for Carex luzulina

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) 970 1260 1550
Slope Gradient (%) 0 2 5
Aspect (degrees)
[0 - N; 90 - E; 180 - S; 270 - W]
280 280 280
Soil Moisture Regime (SMR)
[0 - very xeric; 4 - mesic;
8 - hydric]
6 6 6
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: IMA(1), MH(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.

Taxonomic and Nomenclatural Links

Additional Photo Sources

General References