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
Growth Duration: Perennial
Conservation Status: Not of concern
Pollination: Bumblebees, bees, flies, wasps, hummingbirds
Tufted, perennial herbs from a crown, the stem 1-9 dm. tall, glabrous or finely pubescent below the inflorescence.
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.
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.
Capsules 6-8 mm. long.
PNW Herbaria: Specimen records of Penstemon attenuatus in the Consortium of Pacific Northwest Herbaria database
WA Flora Checklist: Penstemon attenuatus checklist entry
OregonFlora: Penstemon attenuatus information
E-Flora BC: Penstemon attenuatus atlas page
CalPhotos: Penstemon attenuatus photos