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 | |
|---|---|
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Scientific classification 
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| 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 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]
References edit
- ^ USDA, NRCS (n.d.). "Penstemon calycosus". The PLANTS Database (plants.usda.gov). Greensboro, North Carolina: National Plant Data Team. Retrieved 24 February 2019.
- ^ "Penstemon calycosus". County-level distribution map from the North American Plant Atlas (NAPA). Biota of North America Program (BONAP). 2014. Retrieved 24 February 2019.
- ^ a b Pennell, Francis (1935). The Scrophulariaceae of Eastern Temperate North America. Philadelphia: Wickersham Printing Company. p. 215.
- ^ a b Chester, Edward (2015). Guide to the Vascular Plants of Tennessee.
- ^ a b Hilty, John (2020). "Penstemon calycosus". Illinois Wildflowers.
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