Page author: Don Knoke
Calamagrostis rubescens

Distribution: British Columbia to California, east to Alberta, Montana and Colorado

Habitat: Dry to moist areas, open sagebrush flats to timbered slopes, moderate to mid-elevations in the mountains

Flowers: Late June - August

Origin: Native

Growth Duration: Perennial

Conservation Status: Not of concern


Strongly rhizomatous perennial, the culms 5-11 dm. tall, smooth.


Sheaths open, smooth; ligules 1-5 mm. long, obtuse, usually lacerate; blades flat, 2-4 mm. broad, scabrous on the lower side.


Inflorescence a tight panicle 4-15 cm. long, pale greenish-white or purplish; spikelets 1-flowered; glumes 4-5 mm. long, acuminate, smooth; lemma thin, papery, shorter than the glumes, the 4 lateral veins extending into short, blunt teeth, with a twisted, bent awn attached 1 mm. above the base slightly exceeding the glumes; callus with a few hairs; palea subequal to the lemma, the rachilla prolonged behind the palea about1.2 mm. long.

Accepted Name:
Calamagrostis rubescens Buckley
Publication: Proc. Acad. Nat. Sci. Philadelphia 14: 92. 1862.

Synonyms & Misapplications:
Calamagrostis fasciculata Kearney
Additional Resources:

PNW Herbaria: Specimen records of Calamagrostis rubescens in the Consortium of Pacific Northwest Herbaria database.

WA Flora Checklist: Calamagrostis rubescens checklist entry.

OregonFlora: Calamagrostis rubescens information.

E-Flora BC: Calamagrostis rubescens atlas page.

CalPhotos: Calamagrostis rubescens photos.

USDA Plants: Calamagrostis rubescens information.

26 photographs:
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