Page author: David Giblin
Penstemon richardsonii
Richardson's penstemon
WTU specimens
Other herbaria

Distribution: Chiefly east of the Cascades in Washington; southern British Columbia to Oregon.

Habitat: Cliff crevices and other dry, rocky places at low elevations.

Flowers: June-August

Origin: Native

Conservation Status: Not of concern


Taprooted perennial, shrubby at the base, the several brittle, slender stems 2-8 dm. tall, puberulent, the inflorescence glandular-hairy and the leaves often glabrous.


Leaves opposite, all cauline, the lower reduced and short-petiolate, the others sessile, sharply serrate-dentate to irregularly pinnatifid, up to 7 cm. long and 3 cm. wide.


Inflorescence a terminal panicle, leafy-bracteate below; calyx 4-8 mm. long, the 5 segments green or purplish, mostly entire, often unequal; corolla bright lavender to purplish-red, glandular-hairy outside, mostly glabrous within, 22-32 mm. long, over 1 cm. wide at the mouth, strongly bilabiate, the upper lip cleft nearly half its length; anthers 1.3-1.7 mm. long, permanently horseshoe shaped, the pollen sacs saccate and indehiscent below; staminode shortly exerted, long-bearded toward the tip, or glabrous.


Capsule 5-8 mm. long

Accepted Name:
Penstemon richardsonii Douglas ex Lindl.

Synonyms & Misapplications:
(none provided)
var. richardsonii – Richardson's penstemon
Additional Resources:

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

WA Flora Checklist: Penstemon richardsonii checklist entry.

E-Flora BC: Penstemon richardsonii atlas page.

CalPhotos: Penstemon richardsonii photos.

USDA Plants: Penstemon richardsonii information.

37 photographs:
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