Penstemon acuminatus |
Penstemon cardwellii |
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sand dune penstemon, sharp-leaved penstemon |
Cardwell's beardtongue |
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Habit | Herbaceous, glabrous perennial from a short, branched woody base, with several stout stems 1.5-6 dm. tall, the herbage glaucous. | Low shrub, the stems 1-3 dm. tall, ascending or erect. |
Leaves | 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. |
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. |
Flowers | 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. |
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 |
Fruits | Capsule 7-12 mm. long, excluding the slender beak, which is up to 5 mm. long. |
Capsule |
Penstemon acuminatus |
Penstemon cardwellii |
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Flowering time | April-June | May-July |
Habitat | Dry, open, sandy places at low elevations. | Open or wooded summits or slopes at middle elevations in the mountains. |
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.
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Occurring west of the Cascades crest in Washington; southwestern Washington to southwestern Oregon.
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Origin | Native | Native |
Conservation status | Not of concern | Not of concern |
Sibling taxa | ||
Subordinate taxa | ||
Web links |