Penstemon tenuis is a species of flowering plant in the plantain family known by the common name sharpsepal beardtongue. It is endemic to Texas, Louisiana, Mississippi, and Arkansas in the United States where it is found in open, damp areas in alluvial soil.[2] It typically flowers from early April into early June.[3]
| Penstemon tenuis | |
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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. tenuis
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| Binomial name | |
| Penstemon tenuis | |
Description
editPenstemon tenuis is a perennial herb with erect, slender stems that can grow upwards of 3 ft (0.91 m) tall. The lanceolate leaves grow opposite and are 4.75 in (121 mm) long and 1 in (25 mm) wide. The leaves have pointed tips and toothed or entire margins. Lower leaves are sessile and upper leaves are connate. The bell-shaped flowers grow in terminal racemes. The pink or lightly purple flowers have white throats. The flowers are 0.5 in (13 mm) wide and slightly longer, and are bilabiate. The upper lip of the flower has two erect lobes and the lower lip has three rounded lips.[4]
References
edit- ^ "Penstemon tenuis". NatureServe Explorer. NatureServe. Retrieved 2018-09-08.
- ^ NRCS. "Penstemon tenuis". PLANTS Database. United States Department of Agriculture (USDA). Retrieved 8 September 2018.
- ^ Francis Whittier Pennell (1922). Proceedings of the Academy of Natural Sciences of Philadelphia: Scrophulariaceae of the West Gulf States. Vol. 73. Academy of Natural Sciences of Philadelphia. p. 492.
- ^ Michael Eason (2018). Wildflowers of Texas. Timber Press. p. 384. ISBN 9781604698626.
