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

Setaria verticillata (L.) P. Beauv.
bur bristlegrass (hooked bristlegrass)
Poaceae (Grass family)

Introduction to Vascular Plants

© Robert Flogaus-Faust  Email the photographer   (Photo ID #29509)

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Distribution of Setaria verticillata
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Species Information

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Annual grass from fibrous roots, usually freely branched basally; stems ascending to erect, 30-100 cm tall.
Sheaths keeled, usually hairy at the throats; blades flat to folded, mostly (3) 4-10 mm wide, rough-margined, usually slightly soft-hairy on the upper surfaces; ligules with the membranous basal portions about as long as the fringes, about 1.5 mm long.
Inflorescence an erect, cylindrical, interrupted panicle, mostly 5-10 cm long, usually about 1 cm wide when pressed; spikelets 2-flowered, 2-2.5 mm long, each subtended by 1 (2), finely barbed bristle mostly 4-7 mm long, the hairs directed downwards; lower glumes 3-nerved, barely 1/2 as long as the upper ones; lower flowers male or sterile, the upper fertile; sterile flowers with lemmas sharp-pointed and with narrow paleas about 1/2 their length; anthers dark purple, about 1 mm long.

Source: The Illustrated Flora of British Columbia

Habitat / Range

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

Source: The Illustrated Flora of British Columbia


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

Chaetochloa verticillata (L.) Scribn.
Panicum verticillatum L.
Setaria carnei A.S. Hitchc.
Setaria verticillata
Setaria verticillata var. ambigua

Taxonomic and Nomenclatural Links

Additional Photo Sources

General References