Page authors: Don Knoke, David Giblin
Achnatherum lemmonii
Lemmon's needlegrass
WTU specimens
Other herbaria

Distribution: Chiefly east of the Cascades in Washington; south-central British Columbia south to California, east to Montana and Arizona.

Habitat: Valleys to mid-elevations in the mountains, often in ponderosa pine forests.

Flowers: May-June

Origin: Native

Conservation Status: Not of concern


Tufted perennial, the culms 2-7 dm. tall.


Sheaths open, glabrous to puberulent; ligules rounded, entire, 1-1.5 mm. long; blades involute, 1.5-2.5 mm. broad.


Inflorescence a narrow panicle 4-15 cm. long, the branches short, erect; spikelets 1-flowered; glumes broad, abruptly acuminate, subequal, 7-12 mm. long, 5-veined; floret 5-7.5 mm. long and 1-1.5 mm. thick; lemmas hardened, silky, with an awn from a terminal notch, the awn 18-29 mm. long, twice bent, the first two sections with hairs 0.5 mm. long; palea 2/3 as long as the lemma; stamens 3, the anthers purplish-red, 3-3.5 mm. long.

Accepted Name:
Achnatherum lemmonii (Vasey) Barkworth

Synonyms & Misapplications:
Stipa columbiana Macoun
Stipa lemmonii (Vasey) Scribn. [HC]
ssp. lemmonii – Lemmon's needlegrass
Additional Resources:

PNW Herbaria: Specimen records of Achnatherum lemmonii in the Consortium of Pacific Northwest Herbaria database.

WA Flora Checklist: Achnatherum lemmonii checklist entry.

E-Flora BC: Achnatherum lemmonii atlas page.

CalPhotos: Achnatherum lemmonii photos.

USDA Plants: Achnatherum lemmonii information.

11 photographs:
Group by