| Name | Penstemon tenuiflorus Pennell |
| Authorship | Pennell |
| Rank | Species |
| NomenclaturalStatus | NomLeg |
| Placed in | Penstemon Schmidel |
| GUID | urn:lsid:ipni.org:names:808314-1 |
| Citation | 1919 Addisonia 4: 79 |
| Holdings | 18 Specimens held in the Harvard University Herbaria identified as Penstemon tenuiflorus Pennell |
| Identification made in | [no date] (18) |
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