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
Scientific classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Asterids
Order: Lamiales
Family: Plantaginaceae
Genus: Penstemon
Species:
P. calycosus
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
  1. "Penstemon calycosus". Natural Resources Conservation Service PLANTS Database. USDA. Retrieved 24 February 2019.
  2. "Penstemon calycosus". County-level distribution map from the North American Plant Atlas (NAPA). Biota of North America Program (BONAP). 2014. Retrieved 24 February 2019.
  3. Pennell, Francis (1935). The Scrophulariaceae of Eastern Temperate North America. Philadelphia: Wickersham Printing Company. p. 215.
  4. Chester, Edward (2015). Guide to the Vascular Plants of Tennessee.
  5. Hilty, John (2016). "Penstemon calycosus". Illinois Wildflowers.


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