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

Cyperus squarrosus L.
awned cyperus (bearded flatsedge)
Cyperaceae (Sedge family)

Introduction to Vascular Plants

© Ryan Batten  Email the photographer   (Photo ID #25815)

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Distribution of Cyperus squarrosus
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Species Information

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Annual, sweet-scented, tufted herb from short rootstocks; stems slender, 3-20 cm tall.
Few, all near the bases; blades mostly 0.5-2 (2.5) mm wide, about as long as the stem.
Inflorescence of dense, more or less short head-like clusters, the terminal unstalked, the others (if present) on slender rays up to 3 cm long, each cluster with dense spikes, the spikelets 6- to 20-flowered, rarely more, 4-10 mm long, 1-2 mm wide, flattened; involucral bracts 2 to 4, elongate, 1-15 cm long, some or all of them much surpassing the inflorescence.
Scales evidently (5-) 7- to 9-nerved, lanceolate to egg-shaped, loose, green, turning brown at maturity, not closely appressed, 1-1.7 mm long excluding the recurved, slender awn-tips, these mostly 0.3-1 mm long; rachillas not winged, persistent, the scales falling from them at maturity; stamens solitary; achenes 3-angled, 0.6-1 mm long.

Source: The Illustrated Flora of British Columbia

Habitat / Range

Moist to wet, often sandy sites in the lowland and steppe zones; rare on S Vancouver Island and SC BC; cosmopolitan, E to PQ and NB and S to FL, TX, NM, AZ, CA and MX; Asia, S America, Africa.

Source: The Illustrated Flora of British Columbia


Ecological Framework for Cyperus squarrosus

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) 2360 2360 2360
Slope Gradient (%)
Aspect (degrees)
[0 - N; 90 - E; 180 - S; 270 - W]
295 294 295
Soil Moisture Regime (SMR)
[0 - very xeric; 4 - mesic;
8 - hydric]
3 3 3
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)


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

Cyperus aristatus Rottb.
Cyperus aristatus var. runyonii O'Neill
Cyperus inflexus Muhl.
Cyperus squarrosus var. runyonii (O'Neill) S.D. Jones & J. Wipff

Taxonomic and Nomenclatural Links

Additional Photo Sources

General References