Page authors: Don Knoke, David Giblin
Penstemon attenuatus
taper-leaved beardtongue, sulphur penstemon, taper-leaved penstemon
WTU specimens
Other herbaria
WTU images

Distribution: Occurring east of the Cascades crest in Washington; southeastern British Columbia to northeastern Oregon, east to western Montana and Wyoming.

Habitat: Dry to moist meadows and woodland slopes from the lowlands to the subalpine.

Flowers: June-August

Origin: Native

Conservation Status: Not of concern

Description:
General:

Tufted, perennial herbs from a crown, the stem 1-9 dm. tall, glabrous or finely pubescent below the inflorescence.

Leaves:

Leaves opposite, deep green, entire, the basal ones well developed, petiolate, up to 17 cm. long and 4 cm. wide, the cauline mostly sessile, reduced upward.

Flowers:

Inflorescence of 2-several dense verticillasters; calyx 4-7 mm. long, the 5 segments lanceolate to ovate or obovate, the margins scarious; corolla 2-lipped, glandular-hairy externally, blue or purple to pale yellow or nearly white, 12-20 mm. long, the tube expanded toward the mouth; staminode and raised portion of lower petal bearded; pollen sacs glabrous, becoming opposite.

Fruits:

Capsules 6-8 mm. long.

Accepted Name:
Penstemon attenuatus Douglas ex Lindl.
Publication: Edwards\\'s Bot. Reg. 15: t. 1295. 1830.

Synonyms & Misapplications:
(none provided)
Infraspecies:
var. attenuatus – taper-leaved beardtongue, sulphur penstemon, taper-leaved penstemon    Occurring east of the Cascades crest in Washington; southeastern British Columbia to northeastern Oregon, east to western Montana and Wyoming.
Additional Resources:

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

WA Flora Checklist: Penstemon attenuatus checklist entry.

E-Flora BC: Penstemon attenuatus atlas page.

CalPhotos: Penstemon attenuatus photos.

USDA Plants: Penstemon attenuatus information.

15 photographs:
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