| Name | Penstemon crandallii subsp. atratus D. D. Keck |
| Authorship | D. D. Keck |
| Rank | Subspecies |
| NomenclaturalStatus | NomLeg |
| Placed in | Penstemon crandallii A. Nelson |
| GUID | urn:lsid:ipni.org:names:187310-2 |
| Citation | 1937 Bull. Torrey Bot. Club 64: 370 |
| Holdings | 3 Specimens held in the Harvard University Herbaria identified as Penstemon crandallii subsp. atratus D. D. Keck |
| Identification made in | [no date] (3) |
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