| Name | Penstemon pennellianus D. D. Keck |
| Authorship | D. D. Keck |
| Rank | Species |
| Placed in | Penstemon Schmidel |
| Citation | 1940 Amer. Midl. Naturalist, Monogr. 23: 614 |
| Holdings | 3 Specimens held in the Harvard University Herbaria identified as Penstemon pennellianus D. D. Keck |
| Identification made in | [no date] (3) |
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