Penstemon grahamii D.D. Keck  
Family: Plantaginaceae
Graham's penstemon,  more...
Penstemon grahamii image
Leila Shultz  
Penstemon grahamii
Penstemon grahamii image
Tony Frates  
Penstemon grahamii image
Tony Frates  
The National Science Foundation
This project made possible by National Science Foundation Award 1410069