Penstemon rupicola is a species of penstemon known by the common names cliff beardtongue or rock penstemon.[1] It is native to the west coast of the United States from Washington to the Klamath Mountains of far northern California, where it grows in rocky mountainous habitat. It is a clumpy, mat-forming subshrub growing no more than 14 centimeters high. The thick, waxy, oppositely arranged leaves are round or oval and up to 2 centimeters long. The showy wide-mouthed tubular flowers emerging from the mat may be nearly 4 centimeters in length and are shades of light purple to bright pink.
| Penstemon rupicola | |
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| Penstemon rupicola in Mount Rainier National Park | |
Scientific classification 
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| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Eudicots |
| Clade: | Asterids |
| Order: | Lamiales |
| Family: | Plantaginaceae |
| Genus: | Penstemon |
| Species: | P. rupicola
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| Binomial name | |
| Penstemon rupicola | |
Penstemon rupicola is included in Penstemon subgenus Dasanthera, along with P. barrettiae, P. cardwellii, P. davidsonii, P. ellipticus, P. fruticosus, P. lyallii, P. montanus, and P. newberryi.[2]
It has gained the Royal Horticultural Society's Award of Garden Merit.[1]
References edit
- ^ a b "Penstemon rupicola". www.rhs.org. Royal Horticultural Society. Retrieved 24 January 2021.
- ^ "Penstemon - Dasanthera Group". North American Rock Garden Society. Retrieved June 21, 2014.
External links edit
- Jepson Manual Treatment of Penstemon rupicola
- Washington Burke Museum
- Penstemon rupicola — UC Photos gallery
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