Page author: Don Knoke
Setaria verticillata
hooked bristlegrass, rough bristlegrass

Distribution: Sparingly introduced in the Pacific Northwest; more common in other parts of the United States.

Habitat: Weed of gardens, irrigated areas and wasteland.

Flowers: August - September

Origin: Introduced from Europe

Growth Duration: Annual

Conservation Status: Not of concern

Pollination: Wind


Annual, the culms 3-10 dm. tall, hollow, ascending to erect, usually freely branched from the base.


Sheaths open, pubescent at the throat; ligules about 1.5 mm. long, the outer half a fringe; blades flat, 4-10 mm. broad, scabrous-margined.


Inflorescence a cylindric, congested, erect panicle 5-10 cm. long; spikelets articulate below the glumes, sub-terete, 2-flowered, each subtended by a bristle 4-7 mm. long, retrorsely finely barbed; spikelets 2-2.5 mm. long; first glume 3-veined, half as along as the second; second glume 5-nerved, about equal to the lemma; lower flower sterile, the lemma acute, the narrow palea about half its length; upper flower perfect, the lemma leathery, enclosing the palea; anthers dark purple.

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

Synonyms & Misapplications:
Chaetochloa verticillata (L.) Scribn.
Panicum verticillatum L.
Setaria carnei Hitchc.
Additional Resources:

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

WA Flora Checklist: Setaria verticillata checklist entry.

OregonFlora: Setaria verticillata information.

E-Flora BC: Setaria verticillata atlas page.

CalPhotos: Setaria verticillata photos.

USDA Plants: Setaria verticillata information.

9 photographs:
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