Page author: David Giblin
Penstemon rydbergii
Rydberg's beardtongue

Distribution: Occurring east of the Cascades in Washington; Washington south to the Sierras of California, east to northern Wyoming and northern New Mexico.

Habitat: Meadows and moist, open slopes, occasionally on drier slopes with sagebrush, chiefly in the foothills and at moderate elevations in the mountains.

Flowers: May-July

Origin: Native

Growth Duration: Perennial

Conservation Status: Not of concern


Tufted perennial from a woody rhizome, the slender stems 2-7 dm. tall, usually glabrous throughout.


Leaves opposite, entire, the basal ones petiolate, oblanceolate, often forming rosettes, up to 15 cm. long and 2 cm. wide; cauline leaves few, well-developed, sessile, not over 10 cm. long and 2 cm. wide.


Inflorescence of 1-several dense verticillasters, the flowers spreading at right angles to the stem; calyx 3-7 mm. long, the 5 segments narrowly scarious-margined, tapering to a pointed tip; corolla blue-purple, 11-15 mm. long, bilabiate, the tube expanded, 3-5 mm. wide at the mouth; raised portion of the lower petal bearded; staminode usually bearded at the expanded tip; pollen sacs glabrous, ovate, 0.6-1.0 mm. long, dehiscent throughout and becoming opposite.


Capsule 5-6 mm. long.

Accepted Name:
Penstemon rydbergii A. Nelson
Publication: Bull. Torrey Bot. Club 25(5): 281. 1898.

Synonyms & Misapplications:
(none provided)
Additional Resources:

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

WA Flora Checklist: Penstemon rydbergii checklist entry.

E-Flora BC: Penstemon rydbergii atlas page.

CalPhotos: Penstemon rydbergii photos.

USDA Plants: Penstemon rydbergii information.

53 photographs:
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