| Name | Penstemon gracilis var. wisconsinensis (Pennell) Fassett |
| Authorship | (Pennell) Fassett |
| Rank | Variety |
| Placed in | Penstemon gracilis Nuttall |
| Citation | 1938 Spring Fl. Wisconsin, ed. 2 144 |
| Holdings | 17 Specimens held in the Harvard University Herbaria identified as Penstemon gracilis var. wisconsinensis (Pennell) Fassett |
| Identification made in | [no date] (15), 1930 (1), 1934 (1) |
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