| Name | Penstemon strictus subsp. strictiformis (Rydberg) D. D. Keck |
| Authorship | (Rydberg) D. D. Keck |
| Rank | Subspecies |
| Placed in | Penstemon strictus Bentham |
| Citation | 1939 J. Wash. Acad. Sci. 29: 491 |
| Holdings | 8 Specimens held in the Harvard University Herbaria identified as Penstemon strictus subsp. strictiformis (Rydberg) D. D. Keck |
| Identification made in | [no date] (8) |
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