| Name | Penstemon azureus var. ambiguus A. Gray |
| Authorship | A. Gray |
| Rank | Variety |
| NomenclaturalStatus | NomLeg |
| Placed in | Penstemon azureus Bentham |
| GUID | urn:lsid:ipni.org:names:187187-2 |
| Citation | 1878 Syn. Fl. N. Amer. 2(1): 272 |
| Holdings | 1 Specimen held in the Harvard University Herbaria identified as Penstemon azureus var. ambiguus A. Gray |
| Identification made in | [no date] (1) |
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