| Name | Penstemon ambiguus subsp. laevissimus D. D. Keck |
| Authorship | D. D. Keck |
| Rank | Subspecies |
| NomenclaturalStatus | NomLeg |
| Placed in | Penstemon ambiguus Torrey |
| GUID | urn:lsid:ipni.org:names:187141-2 |
| Citation | 1939 J. Wash. Acad. Sci. 29: 491 |
| Holdings | 10 Specimens held in the Harvard University Herbaria identified as Penstemon ambiguus subsp. laevissimus D. D. Keck |
| Identification made in | [no date] (10) |
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