| Name | Penstemon virgatus subsp. arizonicus (A. Gray) D. D. Keck |
| Authorship | (A. Gray) D. D. Keck |
| Rank | Subspecies |
| Placed in | Penstemon virgatus A. Gray |
| Citation | 1939 J. Wash. Acad. Sci. 29: 491 |
| Holdings | 2 Specimens held in the Harvard University Herbaria identified as Penstemon virgatus subsp. arizonicus (A. Gray) D. D. Keck |
| Identification made in | [no date] (2) |
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