Distribution: Occurring west of the Cascades crest in Washington; southwestern Washington to southwestern Oregon.
Habitat: Open or wooded summits or slopes at middle elevations in the mountains.
Flowers: May-July
Origin: Native
Growth Duration: Perennial
Conservation Status: Not of concern
Pollination: Bumblebees, bees, flies, wasps, hummingbirds
Low shrub, the stems 1-3 dm. tall, ascending or erect.
Leaves opposite, glabrous, the largest on short, sterile shoots, serrulate or nearly entire, short-petiolate, the blades elliptic, 1.5-3.5 cm. long and 6-14 mm. wide; leaves of the flowering shoots less crowded, smaller, sessile and entire.
Inflorescence racemose, few-flowered and crowded, glandular, the simple pedicels opposite and axillary; calyx 5-12 mm. long, the 5 segments thin and lanceolate; corolla bright purple to deep blue-violet, 30-38 mm. long, about 1 cm. wide at the mouth, keeled on the back, glabrous outside and with long, white hairs near the base of the lower lip within; anthers long-wooly, pollen sacs opposite; staminode slender, shorter than the 4 fertile filaments, long-bearded toward the tip
Capsule
PNW Herbaria: Specimen records of Penstemon cardwellii in the Consortium of Pacific Northwest Herbaria database
WA Flora Checklist: Penstemon cardwellii checklist entry
OregonFlora: Penstemon cardwellii information
E-Flora BC: Penstemon cardwellii atlas page
CalPhotos: Penstemon cardwellii photos