| Name | Penstemon linarioides var. viridis D. D. Keck |
| Authorship | D. D. Keck |
| Rank | Variety |
| Placed in | Penstemon linarioides A. Gray |
| Citation | 1937 Bull. Torrey Bot. Club 64: 375 |
| Holdings | 2 Specimens held in the Harvard University Herbaria identified as Penstemon linarioides var. viridis D. D. Keck |
| Identification made in | 1936 (2) |