| Name | Penstemon ambiguus Torrey |
| Authorship | Torrey |
| Rank | Species |
| NomenclaturalStatus | NomLeg |
| Placed in | Penstemon Schmidel |
| Contains | Penstemon ambiguus var. foliosus Bentham Penstemon ambiguus subsp. laevissimus D. D. Keck Penstemon ambiguus var. thurberi (Torrey) A. Gray |
| GUID | urn:lsid:ipni.org:names:187138-2 |
| Holdings | 67 Specimens held in the Harvard University Herbaria identified as Penstemon ambiguus Torrey |
| Identification made in | [no date] (48), 1930 (15), 1933 (2), 1998 (2) |
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