| Name | Penstemon pruinosus Douglas |
| Authorship | Douglas |
| Rank | Species |
| Placed in | Penstemon Schmidel |
| Citation | 1829 Edwards's Bot. Reg. 15: t. 1280 |
| Holdings | 18 Specimens held in the Harvard University Herbaria identified as Penstemon pruinosus Douglas |
| Identification made in | [no date] (18) |
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