Penstemon calycosus | |
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Scientific classification | |
Kingdom: | Plantae |
Clade: | Tracheophytes |
Clade: | Angiosperms |
Clade: | Eudicots |
Clade: | Asterids |
Order: | Lamiales |
Family: | Plantaginaceae |
Genus: | Penstemon |
Species: | P. calycosus
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Binomial name | |
Penstemon calycosus |
Penstemon calycosus, commonly called longsepal beardtongue,[1] is a species of plant in the plantain family (Plantaginaceae). It is native to eastern North America, where it native to the Upper South and Midwestern United States.[2] It expanded its range into the northeast United States in the early 20th century.[3] Its natural habitat is in open woodlands, prairies, and bluffs, often over limestone.[4][5]
Penstemon calycosus is an herbaceous perennial, growing to around 3 feet tall. Its flowers are lavender to purple and tubular.[5] It blooms in late spring and early summer, ranging May to July depending on latitude.[3]
Penstemon calycosus is similar to the more widespread Penstemon digitalis. P. calycosus can be distinguished from P. digitalis by its purple flowers and longer, attenuate sepals.[4]