| Name | Penstemon longiflorus (Pennell) S. L. Clark |
| Authorship | (Pennell) S. L. Clark |
| Rank | Species |
| NomenclaturalStatus | Unknown |
| Placed in | Penstemon Schmidel |
| GUID | urn:lsid:ipni.org:names:187466-2 |
| Holdings | 4 Specimens held in the Harvard University Herbaria identified as Penstemon longiflorus (Pennell) S. L. Clark |
| Identification made in | [no date] (3), 1970 (1) |
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