| Name | Penstemon rupicola (Piper) Howell |
| Authorship | (Piper) Howell |
| Rank | Species |
| Placed in | Penstemon Schmidel |
| Citation | 1901 Fl. N.W. Amer. 1: 510 |
| Holdings | 46 Specimens held in the Harvard University Herbaria identified as Penstemon rupicola (Piper) Howell |
| Identification made in | [no date] (45), 1975 (1) |
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