Page authors: Don Knoke, David Giblin
Danthonia unispicata
few-flower oatgrass, one-spike oatgrass

Distribution: Occurring east of the Cascades crest in Washington; British Columbia to California, east to the northern Rocky Mountains and northern Great Plains.

Habitat: Dry to occasionally moist prairies, foothills, and open parks and ridges in mountain forests.

Flowers: June-July

Origin: Native

Growth Duration: Perennial

Conservation Status: Not of concern

Pollination: Wind


Tufted perennial, the culms hollow, 1-3 dm. tall, the plants usually strongly hairy throughout.


Sheaths open, the hairs at the throat 3-4 mm. long; ligule 0.5-1 mm. long; blades usually involute, 1-3 mm. broad.


Panicle usually reduced to a single spikelet, sometimes with 2 or 3; glumes 5-nerved, the first 15-23 mm. long, the second slightly shorter; lemmas 9-12 mm. long, glabrous on the back and bearded on the margins, bifid, the teeth 1-2 mm. long; awn attached just below the lobes of the lemma 7-8 mm. long; paleas broad, shorter than the lemmas; callus slightly bearded.

Accepted Name:
Danthonia unispicata (Thurb.) Munro ex Macoun
Publication: Proc. Acad. Nat. Sci. Philadelphia 1863: 78. 1863. 1863.

Synonyms & Misapplications:
(none provided)
Additional Resources:

PNW Herbaria: Specimen records of Danthonia unispicata in the Consortium of Pacific Northwest Herbaria database

WA Flora Checklist: Danthonia unispicata checklist entry

OregonFlora: Danthonia unispicata information

E-Flora BC: Danthonia unispicata atlas page

CalPhotos: Danthonia unispicata photos

16 photographs:
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