Page author: David Giblin
Penstemon euglaucus
glaucous beardtongue

Distribution: In Washington from Mt. Adams south; Washington south to central Oregon.

Habitat: Dry, sandy, open or sparsely wooded slopes at moderate elevations to subalpine meadows.

Flowers: June-September

Origin: Native

Conservation Status: Not of concern


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


Leaves opposite, entire, the basal ones petiolate, oblanceolate, forming well-developed 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 3.5-5 mm. long, the 5 segments broadly scarious-margined, abruptly contracted to a narrow, 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, not quite opening to the tip.


Capsule 5-6 mm. long

Accepted Name:
Penstemon euglaucus English
Publication: Proceedings of the Biological Society of Washington 41(45): 197-198. 1928.

Synonyms & Misapplications:
(none provided)
Additional Resources:

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

WA Flora Checklist: Penstemon euglaucus checklist entry.

E-Flora BC: Penstemon euglaucus atlas page.

CalPhotos: Penstemon euglaucus photos.

USDA Plants: Penstemon euglaucus information.

9 photographs:
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