Page author: David Giblin
Penstemon glandulosus
glandular penstemon

Distribution: Along the east base of the Cascades, Chelan to Klickitat Counties, Washington, and at scattered locations in Oregon and Idaho.

Habitat: Open, often rocky hillsides and banks in the foothills, valleys, and lower mountains.

Flowers: May-July

Origin: Native

Conservation Status: Not of concern


Stout perennial herb from a branched, woody base, the several stems 4-10 dm. tall, sticky throughout with stalked glands.


Leaves opposite, sharply toothed or entire, the basal ones 10-35 cm. long and 2.5-9 cm. wide, petiolate, the blade lanceolate to elliptic; lowermost cauline leaves reduced, the others well-developed, sessile and often clasping, broadly lanceolate to rotund-ovate, 4-12 cm. long and 2-5 cm. wide.


Inflorescence of several verticillasters; calyx 9-15 mm. long, the 5 segments narrow and herbaceous; corolla blue-lavender, strongly glandular-hairy outside, glabrous inside, 28-40 mm. long, over 1 cm. wide at the mouth; anthers permanently horseshoe-shaped, 1.7-2.3 mm. long; pollen sacs dehiscent across their apices, the lower part saccate and indehiscent, glabrous; staminode glabrous, the tip flattened.


Capsules 10-14 mm. long, surpassed by the calyx.

Accepted Name:
Penstemon glandulosus Douglas

Synonyms & Misapplications:
(none provided)
var. chelanensis – sticky-stem penstemon
var. glandulosus – sticky-stem penstemon
Additional Resources:

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

WA Flora Checklist: Penstemon glandulosus checklist entry.

E-Flora BC: Penstemon glandulosus atlas page.

CalPhotos: Penstemon glandulosus photos.

USDA Plants: Penstemon glandulosus information.

41 photographs:
Group by