| Name | Penstemon cyathophorus Rydberg |
| Authorship | Rydberg |
| Rank | Species |
| Placed in | Penstemon Schmidel |
| Citation | 1905 Bull. Torrey Bot. Club 31: 643 |
| Holdings | 5 Specimens held in the Harvard University Herbaria identified as Penstemon cyathophorus Rydberg |
| Identification made in | [no date] (3), 1930 (2) |
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