Page authors: Don Knoke, David Giblin
Setaria viridis
green bristlegrass, green foxtail

Distribution: Occurring on both sides of the Cascades crest in Washington; Alaska to California, east across North America to the Atlantic Coast.

Habitat: Fields, roadsides, wastelots, and other disturbed areas.

Flowers: June-October

Origin: Introduced from Eurasia

Growth Duration: Annual

Conservation Status: Not of concern

Pollination: Wind


Annual, the culms erect to decumbent, up to 1 m. tall.


Sheaths open; ligules nearly 2 mm. long; blades flat, mostly glabrous, 4-8 mm. broad.


Inflorescence a cylindric, congested panicle up to 10 cm. long; spikelets articulate below the glumes, 2-flowered, each subtended by 2-3 bristles; the upper, fertile lemma and palea enclosed by the second glume and lower, sterile lemma.



Accepted Name:
Setaria viridis (L.) P. Beauv.
Publication: Ess. Agrostogr. 51, 171, 178. 1812.

Synonyms & Misapplications:
Chaetochloa viridis (L.) Scribn.
Panicum viride L.
Setaria viridis (L.) P. Beauv. var. breviseta (Döll) Hitchc.
Setaria viridis (L.) P. Beauv. var. weinmannii (Roem. & Schult.) Borbás
Additional Resources:

PNW Herbaria: Specimen records of Setaria viridis in the Consortium of Pacific Northwest Herbaria database

WA Flora Checklist: Setaria viridis checklist entry

OregonFlora: Setaria viridis information

E-Flora BC: Setaria viridis atlas page

CalPhotos: Setaria viridis photos

33 photographs:
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