Penstemon pruinosus |
Penstemon davidsonii |
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Chelan beardtongue |
Davidson's penstemon |
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Habit | Plants tufted from a stout, branched, and woody base, the stems 1-4 dm. tall; inflorescence always glandular-hairy, the rest of the plant varying from glandular-hairy to glabrous. | Perennial, forming dense mats with creeping, woody stems, and with scattered, erect flowering stems 0.5-1 dm. tall. |
Leaves | Leaves opposite, usually sharply serrate, sometimes most of them entire; basal leaves well-developed, up to 10 cm. long and 2 cm. wide, the blades elliptic to ovate, equaling the petiole; cauline leaves sessile, triangular-ovate to narrowly lanceolate, smaller than the basal leaves. |
Mat leaves thick and firm, glabrous, entire or serrulate, short-petiolate, the blade 0.5-1.5 cm. long and 1 to 2.5 times as long as wide; cauline leaves few and small, often bract-like, less than 1 cm. long. |
Flowers | Inflorescence of several compact verticillasters; calyx 3-6 mm. long, the 5 segments broadly lanceolate; corolla deep blue or lavender, 11-16 mm. long, the tube slightly expanded, 2.5-5 mm. wide at the mouth, the throat paler and marked with guide lines, glandular-hairy externally, the raised portion of the lower lip bearded; pollen sacs glabrous, dehiscent throughout and becoming opposite; staminode with a bearded tip. |
Inflorescence a compact, few-flowered raceme, glandular-hairy; calyx glabrous, 7-10 mm. long, the 5 segments thin and broadly lanceolate; corolla blue-lavender to purple-violet, 2-3.5 cm. long, keeled along the back, glabrous outside, hairy near the base of the lower lip within; anthers long-woolly, the pollen sacs opening wide enough to form a plane; staminode (fertile stamen) slender, shorter than the 4 fertile filaments, long-bearded toward the tip. |
Fruits | Capsule 5-7 mm. long, glabrous. |
Capsule 8-10 mm. long |
Penstemon pruinosus |
Penstemon davidsonii |
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Flowering time | May-July | June-August |
Habitat | Open, rocky places from the valleys and plains to moderate elevations in the mountains, and in the scablands in Washington. | Open, rocky areas, from middle to high elevations in the mountains. |
Distribution | Occurring east of the Cascades crest in Washington; British Columbia to Washington.
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Occurring on both sides of the Cascades crest in Washington; British Columbia to California and Nevada.
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Origin | Native | Native |
Conservation status | Not of concern | Not of concern |
Sibling taxa | ||
Subordinate taxa | ||
Web links |