| Name | Penstemon eatonii var. exsertus (A. Nelson) C. C. Freeman |
| Authorship | (A. Nelson) C. C. Freeman |
| Rank | Variety |
| Placed in | Penstemon eatonii A. Gray |
| Citation | 2017 PhytoKeys 80: 35 |
| Holdings | 6 Specimens held in the Harvard University Herbaria identified as Penstemon eatonii var. exsertus (A. Nelson) C. C. Freeman |
| Identification made in | [no date] (6) |
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