Page author: David Giblin
Penstemon deustus
hot-rock penstemon

Distribution: Occurring east of the Cascades crest in Washington; British Columbia to California, east to Montana and Utah.

Habitat: Dry sites at moderate to mid-elevations in the mountains.

Flowers: May-July

Origin: Native

Growth Duration: Perennial

Conservation Status: Not of concern


Plants with a much-branched, woody base, the flowering stems simple and erect, 2-6 dm. tall; plants usually glandular in the inflorescence, otherwise glabrous.


Leaves opposite, ternate, whorled or scattered, sharply toothed to entire; leaves on the short, sterile shoots oblanceolate to elliptic and short-petiolate, those on the flowering stems usually sessile and broad-based, up to 6 cm. long and 2.5 cm. wide.


Inflorescence of several verticillasters, often rather loose; calyx 2.5-6 mm. long, the 5 segments lanceolate; corolla dull whitish with some purplish lines within, sometimes washed with lavender, 8-20 mm. long, the tube narrow; staminode glabrous or hairy, not expanded toward the tip; pollen sacs 0.5-0.9 mm. long, glabrous, dehiscent throughout, widely spreading.


Capsule 3-5 mm. long.

Accepted Name:
Penstemon deustus Douglas ex Lindl.

Synonyms & Misapplications:
(none provided)
var. deustus – hot-rock penstemon
var. variabilis – hotrock penstemon, scabland penstemon, scorched penstemon
Additional Resources:

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

WA Flora Checklist: Penstemon deustus checklist entry.

E-Flora BC: Penstemon deustus atlas page.

CalPhotos: Penstemon deustus photos.

USDA Plants: Penstemon deustus information.

31 photographs:
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