Page author: Don Knoke
Bromus hordeaceus
soft chess

Distribution: Common introduction from Alaska south to Baja California, east to Idaho and Montana.

Habitat: Waste ground, roadsides, dry hillsides.

Flowers: May - July

Origin: Introduced

Growth Duration: Annual

Conservation Status: Not of concern


Annual, the culms 2-7 dm. tall, usually soft-pubescent throughout.


Sheaths closed; ligules 0.5-1 mm. long, hairy; blades flat, 1.5-4 mm. broad.


Inflorescence an erect, narrow, crowded panicle 3-10 cm. long, the spikelets exceeding the pedicles; spikelets 5- to 7-flowered, 1-2 cm. long; first glume 4-6 mm. long, lanceolate, the second slightly longer and wider; lemmas 6.5-8.5 mm. long, the area between the nerves depressed and concave; lemmas with straight awns 6-10 mm. long from a bifid apex.

Accepted Name:
Bromus hordeaceus L.

Synonyms & Misapplications:
Bromus hordeaceus L. ssp. hordeaceus
Bromus mollis L. [HC]
Additional Resources:

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

WA Flora Checklist: Bromus hordeaceus checklist entry.

E-Flora BC: Bromus hordeaceus atlas page.

CalPhotos: Bromus hordeaceus photos.

USDA Plants: Bromus hordeaceus information.

14 photographs:
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