Page author: David Giblin
Penstemon wilcoxii
Wilcox's beardtongue

Distribution: Occurring chiefly east of the Cascades crest in Washington; Washington to Oregon, east to Montana.

Habitat: Open or often wooded, sometimes in rocky places, from the foothills to moderate elevations in the mountains.

Flowers: May-July

Origin: Native

Conservation Status: Threatened in Washington (WANHP)


Perennial from a branched, woody base, the clustered stems 3-10 dm. tall, usually glabrous except for the inflorescence


Leaves opposite, strongly serrate with slender teeth, the basal leaves well-developed, elliptic to deltoid-ovate, the blade up to 9 cm. long and 5 cm. wide, about equal to the petiole; cauline leaves often larger than the basal, sessile, 4-10 cm. long and 1.5-4 cm. wide.


Inflorescence of several large, loose verticillasters; calyx 2.5-5 mm. long, the 5 segments broadly lanceolate, narrowly scarious-margined; corolla blue, the paler throat with guide lines, 15-23 mm. long, the tube 4-8 mm. wide at the mouth, glandular-hairy on the outside, strongly bilabiate, the lower lip much longer than the upper, the raised portion bearded; pollen sacs 0.7-1.0 mm. long, wholly dehiscent, becoming opposite, glabrous; staminode with a recurved, bearded tip.


Capsule 4-6 mm. long.

Accepted Name:
Penstemon wilcoxii Rydb.
Publication: Bulletin of the Torrey Botanical Club 28(1): 28-29. 1901.

Synonyms & Misapplications:
Penstemon ovatus Douglas var. pinetorum Piper
Additional Resources:

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

WA Flora Checklist: Penstemon wilcoxii checklist entry.

E-Flora BC: Penstemon wilcoxii atlas page.

CalPhotos: Penstemon wilcoxii photos.

USDA Plants: Penstemon wilcoxii information.

44 photographs:
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