Page author: David Giblin
Penstemon davidsonii
Davidson's penstemon
WTU specimens
Other herbaria

Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia south to California and Nevada.

Habitat: Open, rocky areas, mid- to high elevations in the mountains.

Flowers: June-August

Origin: Native

Conservation Status: Not of concern

Description:
General:

Perennial, forming dense mats with creeping, woody stems, and with scattered, erect flowering stems 0.5-1 dm. tall.

Leaves:

Mat leaves thick and firm, glabrous, entire or serrulate, short-petiolate, the blade 0.5-1.5 cm. long and 1 to 2.5 times as long as wide; cauline leaves few and small, often bract-like, less than 1 cm. long.

Flowers:

Inflorescence a compact, few-flowered raceme, glandular-hairy; calyx glabrous, 7-10 mm. long, the 5 segments thin and broadly lanceolate; corolla blue-lavender to purple-violet, 2-3.5 cm. long, keeled along the back, glabrous outside, hairy near the base of the lower lip within; anthers long-woolly, the pollen sacs opening wide enough to form a plane; staminode (fertile stamen) slender, shorter than the 4 fertile filaments, long-bearded toward the tip.

Fruits:

Capsule 8-10 mm. long

Accepted Name:
Penstemon davidsonii Greene

Synonyms:
(none provided)
Infraspecies:
var. davidsonii – Davidson's penstemon    Both sides of the Cascades, British Columbia to California and Nevada
var. menziesii – Davidson's penstemon
Additional Resources:

PNW Herbaria: Specimen records of Penstemon davidsonii in the Consortium of Pacific Northwest Herbaria database.

WA Flora Checklist: Penstemon davidsonii checklist entry.

E-Flora BC: Penstemon davidsonii atlas page.

CalPhotos: Penstemon davidsonii photos.

USDA Plants: Penstemon davidsonii information.

53 photographs:
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