Page authors: Don Knoke, David Giblin
Lupinus sericeus
silky lupine
WTU specimens
Other herbaria

Distribution: Occurring east of the Cascades crest in Washington; British Columbia to Oregon, east to Alberta and Rocky Mountains.

Habitat: Sagebrush deserts to forest openings at moderate elevations.

Flowers: May-August

Origin: Native

Conservation Status: Not of concern

Description:
General:

Perennial from a branching crown with several stems 2-5 dm. tall, usually simple or sparingly branched above, silvery to somewhat rust-colored from the pubescence, which is of two distinct lengths.

Leaves:

Leaves at flowering almost entirely cauline, the petioles of the lower leaves 3 times as long as the blade, reduced upward to equal to the blade; leaflets 7-9, oblanceolate, 3-6 cm. long and 3-6 mm. wide, silky on both surfaces.

Flowers:

Inflorescence of loose racemes, 10-15 cm. long, several times as long as the peduncles; pedicles 4-7 mm. long; flowers scattered to nearly verticillate, 10-12 mm. long, mostly lavender or blue, sometimes yellowish or whitish; calyx silky, deeply two-lipped; banner well reflexed from the keel, mostly silky on the back, usually whitish-centered; wings glabrous; keel with marginal hairs, the tip upturned.

Fruits:

Pods silky, 2-3 cm. long and nearly 1 cm. broad.

Accepted Name:
Lupinus sericeus Pursh
Publication: Fl. Amer. Sept. (Pursh) 2: 468. 1813.

Synonyms & Misapplications:
(none provided)
Infraspecies:
var. asotinensis – silky lupine   Endemic from Whitman to Asotin counties in Washington.
var. sericeus – silky lupine    Occurring east of the Cascades crest in Washington; British Columbia to Oregon, east to Alberta and Rocky Mountains.
Additional Resources:

PNW Herbaria: Specimen records of Lupinus sericeus in the Consortium of Pacific Northwest Herbaria database.

WA Flora Checklist: Lupinus sericeus checklist entry.

E-Flora BC: Lupinus sericeus atlas page.

CalPhotos: Lupinus sericeus photos.

USDA Plants: Lupinus sericeus information.

45 photographs:
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