Page author: David Giblin
Penstemon pruinosus
Chelan beardtongue

Distribution: Chiefly on the east slope of the Cascades in Washington; British Columbia south to Washington.

Habitat: Open, rocky places from the valleys and plains to moderate elevations in the mountains, and in the scablands in Washington.

Flowers: May-July

Origin: Native

Growth Duration: Perennial

Conservation Status: Not of concern

Pollination: Bumblebees, bees, flies, wasps, hummingbirds


Plants tufted from a stout, branched, and woody base, the stems 1-4 dm. tall; inflorescence always glandular-hairy, the rest of the plant varying from glandular-hairy to glabrous.


Leaves opposite, usually sharply serrate, sometimes most of them entire; basal leaves well-developed, up to 10 cm. long and 2 cm. wide, the blades elliptic to ovate, equaling the petiole; cauline leaves sessile, triangular-ovate to narrowly lanceolate, smaller than the basal leaves.


Inflorescence of several compact verticillasters; calyx 3-6 mm. long, the 5 segments broadly lanceolate; corolla deep blue or lavender, 11-16 mm. long, the tube slightly expanded, 2.5-5 mm. wide at the mouth, the throat paler and marked with guide lines, glandular-hairy externally, the raised portion of the lower lip bearded; pollen sacs glabrous, dehiscent throughout and becoming opposite; staminode with a bearded tip.


Capsule 5-7 mm. long, glabrous.

Accepted Name:
Penstemon pruinosus Douglas ex Lindl.
Publication: Botanical Register; consisting of coloured . . . 15: pl. 1280. 1828.

Synonyms & Misapplications:
(none provided)
Additional Resources:

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

WA Flora Checklist: Penstemon pruinosus checklist entry.

OregonFlora: Penstemon pruinosus information.

E-Flora BC: Penstemon pruinosus atlas page.

CalPhotos: Penstemon pruinosus photos.

USDA Plants: Penstemon pruinosus information.

49 photographs:
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