| Name | Penstemon grahamii D. D. Keck |
| Authorship | D. D. Keck |
| Rank | Species |
| Placed in | Penstemon Schmidel |
| Citation | 1937 Ann. Carnegie Mus. 26: 331 |
| Holdings | 1 Specimen held in the Harvard University Herbaria identified as Penstemon grahamii D. D. Keck |
| Identification made in | [no date] (1) |
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