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

Setaria viridis (L.) P. Beauv. var. viridis
green bristlegrass
Poaceae (Grass family)

Introduction to Vascular Plants
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E-Flora BC Static Map
Distribution of Setaria viridis var. viridis
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Species Information

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Annual grass from fibrous roots, basally branching; stems decumbent to erect, 10-100 cm tall.
Sheaths keeled, smooth; blades flat to folded, 4-11 mm wide, smooth or fringed with soft fine hairs at the throats, the collars slightly hairy or smooth; ligules scarcely 2 mm long, fringed with fine hairs.
Inflorescence a rather narrow, cylindrical panicle, not obviously lobed, rarely over 10 cm long, 15 mm wide when pressed; spikelets 2-flowered, 3-3.6 mm long, each subtended by 2 or 3 (4), rough bristles that are up to 3 times as long as the spikelets, the hairs directed upwards; lower flowers staminate or sterile, the upper fertile; fertile lemmas and paleas nearly completely enclosed by the upper glumes and sterile lemmas, and not shed separately from them, usually evidently cross-wrinkled when mature.
Closely related to S. italica.

Source: The Illustrated Flora of British Columbia

Habitat / Range

Mesic to dry fields, roadsides and waste areas in the lowland, steppe and montane zones; frequent in S BC; introduced from Eurasia.

Source: The Illustrated Flora of British Columbia


Ecological Framework for Setaria viridis var. viridis

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) 968 968 968
Slope Gradient (%) 0 0 0
Aspect (degrees)
[0 - N; 90 - E; 180 - S; 270 - W]
Soil Moisture Regime (SMR)
[0 - very xeric; 4 - mesic;
8 - hydric]
1 1 1
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: ICH(1)

Taxonomic and Nomenclatural Links

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General References