Distribution: Occurring east of the Cascades crest from Chelan and Douglas counties south along the Columbia River to Klickitat County; central Washington to north-central Oregon, also from southeastern Oregon to northern Nevada, east to southwestern Idaho.
Habitat: Dry, open, sandy places at low elevations.
Flowers: April-June
Origin: Native
Growth Duration: Perennial
Conservation Status: Not of concern
Pollination: Bumblebees, bees, flies, wasps, hummingbirds
Herbaceous, glabrous perennial from a short, branched woody base, with several stout stems 1.5-6 dm. tall, the herbage glaucous.
Leaves opposite, thick and firm, the basal leaves tufted, oblanceolate, up to 15 cm. long and 2 cm. wide; cauline leaves sessile and clasping, progressively shorter and broader upward.
Inflorescence of rather dense verticillasters, the bracts subtending the lower verticillasters broad and leafy, the upper ones reduced; calyx deeply 5-parted, the segments lanceolate, entire; corolla bright blue, tubular, 14-21 mm. long, the tube expanded toward the end; pollen sacs glabrous, dehiscent throughout and becoming opposite, 0.8-1.2 mm. long; staminode (sterile stamen) usually yellow-bearded for about 1 mm. toward the tip.
Capsule 7-12 mm. long, excluding the slender beak, which is up to 5 mm. long.
PNW Herbaria: Specimen records of Penstemon acuminatus in the Consortium of Pacific Northwest Herbaria database
WA Flora Checklist: Penstemon acuminatus checklist entry
OregonFlora: Penstemon acuminatus information
E-Flora BC: Penstemon acuminatus atlas page
CalPhotos: Penstemon acuminatus photos