| Penstemon rupicola | |
|---|---|
 | |
| Penstemon rupicola in Mount Rainier National Park | |
Scientific classification  | |
| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Eudicots |
| Clade: | Asterids |
| Order: | Lamiales |
| Family: | Plantaginaceae |
| Genus: | Penstemon |
| Species: | P. rupicola |
| Binomial name | |
| Penstemon rupicola | |
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.
It has gained the Royal Horticultural Society's Award of Garden Merit. [1]
