Page author: Don Knoke
Oryzopsis asperifolia
white-grain mountain-rice grass

Distribution: British Columbia east to Newfoundland, south to Maine and Montana and the northeast portion of Washington.

Habitat: Open coniferous woods.

Flowers: May - July

Origin: Native

Conservation Status: Not of concern


Tufted perennial, the hollow culms 2-5 dm. tall, often exceeded by the erect, stiff blades of the several sterile stems.


Sheaths open; ligules about 0.5 mm. long, higher on the sides than on the back; blades of the flowering stems reduced or lacking; blades of the sterile stems erect, tough, flat, 3-7 mm. broad, scabrous, tapering strongly at both ends.


Inflorescence a narrow panicle that is often nearly reduced to a raceme 4-8 cm. long; spikelets 1-flowered; glumes broad, subequal, about 7 mm. long, 7-nerved, abruptly narrowed to an acute tip; lemmas equal to the glumes, hardened, pubescent, with a bent terminal awn, strongly hairy on the upper part of the short callus; paleas equal to the lemmas; anthers 3.5 mm. long, the tips with a tuft of hairs.

Accepted Name:
Oryzopsis asperifolia Michx.
Publication: Flora Boreali-Americana 1: 51, pl. 9. 1803.

Synonyms & Misapplications:
(none provided)
Additional Resources:

PNW Herbaria: Specimen records of Oryzopsis asperifolia in the Consortium of Pacific Northwest Herbaria database.

WA Flora Checklist: Oryzopsis asperifolia checklist entry.

E-Flora BC: Oryzopsis asperifolia atlas page.

CalPhotos: Oryzopsis asperifolia photos.

USDA Plants: Oryzopsis asperifolia information.

8 photographs:
Group by