Page author: Don Knoke
Bromus briziformis
rattlesnake brome

Distribution: Southern British Columbia south to California, east to Idaho and Montana; occasional in eastern United States.

Habitat: Waste ground, roadsides, and overgrazed areas.

Flowers: Late May - July

Origin: Introduced

Conservation Status: Not of concern


Annual, the culms mostly glabrous, 2-6 dm. tall, hollow


Sheaths closed, covered with long, soft hairs; auricles lacking; ligules 0.5-1.5 mm. long, pubescent; blades 2-5 mm. broad, pubescent.


Inflorescence a one-sided panicle 4-12 cm. long, the branches slender and lax, usually with a single spikelet; spikelets strongly compressed, oblong-ovate, 15-30 mm. long and 8-12 mm. broad, glabrous, 9- to 15-flowered; glumes oblong-lanceolate, the first 4-6 mm. long, the second 7-9 mm. long; lemmas strongly inflated, 9-11 mm. long, usually awnless; paleas 1-3 mm. shorter than the lemmas; anthers 3, rarely exerted.



Accepted Name:
Bromus briziformis Fisch. & C.A. Mey.
Publication: Index Sem. (St. Petersburg) 3: 30. 1837.

Synonyms & Misapplications:
Bromus brizaeformis Fisch. & C. Mey., orthographic variant [HC]
Additional Resources:

PNW Herbaria: Specimen records of Bromus briziformis in the Consortium of Pacific Northwest Herbaria database.

WA Flora Checklist: Bromus briziformis checklist entry.

E-Flora BC: Bromus briziformis atlas page.

CalPhotos: Bromus briziformis photos.

USDA Plants: Bromus briziformis information.

28 photographs:
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