Penstemon virgatus var. asa-grayi

(Upland Blue Beardtongue)

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Penstemon virgatus var. asa-grayi, Fourmile Area, Chaffee Co. 6290

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Penstemon virgatus var. asa-grayi, Four Mile Area, Chaffee Co. 9842

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Penstemon virgatus var. asa-grayi, Fourmile Area, Chaffee Co. 6297

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Penstemon virgatus var. asa-grayi, Fourmile Area, Chaffee Co. 6422

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Penstemon virgatus var. asa-grayi, Fourmile Area, Chaffee Co. 6489

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Penstemon virgatus var. asa-grayi, Fourmile Area, Chaffee Co. 6498

Scientific Name Penstemon virgatus var. asa-grayi (Penstemon unilateralis) USDA PLANTS Symbol PEVIA
Common Name Upland Blue Beardtongue, Beardless Sidebells Penstemon ITIS Taxonomic Serial No. 538522
Family Plantaginaceae (Plantain) formerly Scrophulariaceae SEINet
Reference
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Description Life zones and habitat: Plains to montane (4400 to 10000 ft). Grasslands, meadows, rocky hillsides and moist locations in coniferous forests.
Plant: Erect unbranched perennial 1 to 2+ feet tall, multiple stems, usually in colonies.
Leaves: Basal leaves narrowly to widely oblanceolate 3/4 to 4 inches long; stem leaves linear to lanceolate; both smooth with entire margins.
Inflorescence: Hairless flowers in a thryse, tending to be on one side of the stem; each 5-lobed flower about 1 inch long, pale purple, sepals purplish with smooth edges; stamens and anthers hairless, staminode (unfertile stamen in center) hairless or with small hairs at tip.
Bloom Period: June to August.
References: "Flora of Colorado" by Jennifer Ackerfield and American Southwest.
BONAP Distribution Map
Colorado Status:
Native

© Tom Lebsack 2022

Banner photo: Ten Mile Range and Rhodiola integrifolia (King’s Crown) in Summit County