| Name | Penstemon caesius A. Gray |
| Authorship | A. Gray |
| Rank | Species |
| NomenclaturalStatus | NomLeg |
| Placed in | Penstemon Schmidel |
| GUID | urn:lsid:ipni.org:names:808022-1 |
| Citation | 1883 Proc. Amer. Acad. Arts 19: 92 |
| Holdings | 20 Specimens held in the Harvard University Herbaria identified as Penstemon caesius A. Gray |
| Identification made in | [no date] (20) |
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