Page authors: Don Knoke, David Giblin
Aira caryophyllea
silver hairgrass
WTU specimens
Other herbaria
WTU images

Distribution: Occurring west of the Cascades crest in Washington and east in the Columbia River Gorge; British Columbia to California, east to Idaho and Wyoming, also in the southeastern U.S. and northeastern North America.

Habitat: Balds, prairies, meadows, forest openings, roadsides, wastelots, and other open areas at low to middle elevations.

Flowers: May-August

Origin: Introduced Eurasia and North Africa

Conservation Status: Not of concern

Description:
General:

Delicate annuals, the culms 1 to several, 5-30 cm. tall, hollow, mostly glabrous.

Leaves:

Sheaths open; ligules 1.5-3.5 mm. long, puberulent, the tip blunt; blades involute, filiform, under 1 mm. broad.

Flowers:

Inflorescence an open panicle, up to 6 cm. long and nearly as broad; spikelets 2-flowered; glumes subequal, keeled, 2.5-2.8 mm. long, 1-nerved; lemmas rounded on the back, 3-nerved, bifid at the tip, 2-2.3 mm. long, both awned, the awns 2.5-3.5 mm. long, attached below mid-length, twisted and bent; lodicules small, lanceolate.

Fruits:

Utricle

Accepted Name:
Aira caryophyllea L.
Publication: Sp. Pl. 1: 66. 1753.

Synonyms & Misapplications:
Aspris caryophyllea (L.) Nash
Infraspecies:
var. caryophyllea – silver hairgrass    Occurring west of the Cascades crest in Washington and east in the Columbia River Gorge; British Columbia to California, east to Idaho and Wyoming, also in the southeastern U.S. and northeastern North America.
Additional Resources:

PNW Herbaria: Specimen records of Aira caryophyllea in the Consortium of Pacific Northwest Herbaria database.

WA Flora Checklist: Aira caryophyllea checklist entry.

E-Flora BC: Aira caryophyllea atlas page.

CalPhotos: Aira caryophyllea photos.

USDA Plants: Aira caryophyllea information.

18 photographs:
Group by