Page author: Don Knoke
Danthonia unispicata
few-flower oatgrass, one-spike oatgrass

Distribution: British Columbia south on both sides of the Cascades to California, east to Alberta and Colorado.

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

Flowers: June - July

Origin: Native

Conservation Status: Not of concern


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.

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.

E-Flora BC: Danthonia unispicata atlas page.

CalPhotos: Danthonia unispicata photos.

USDA Plants: Danthonia unispicata information.

16 photographs:
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