| Name | Penstemon scariosus Pennell |
| Authorship | Pennell |
| Rank | Species |
| Placed in | Penstemon Schmidel |
| Citation | 1920 Contr. U.S. Natl. Herb. 20: 353 |
| Holdings | 5 Specimens held in the Harvard University Herbaria identified as Penstemon scariosus Pennell |
| Identification made in | [no date] (4), 1984 (1) |
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