| Name | Penstemon fruticosus subsp. serratus D. D. Keck |
| Authorship | D. D. Keck |
| Rank | Subspecies |
| NomenclaturalStatus | NomLeg |
| Placed in | Penstemon fruticosus (Pursh) Greene |
| GUID | urn:lsid:ipni.org:names:1073333-2 |
| Citation | 1951 Ill. Fl. Pacific States 3: 765 |
| Holdings | 1 Specimen held in the Harvard University Herbaria identified as Penstemon fruticosus subsp. serratus D. D. Keck |
| Identification made in | [no date] (1) |
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