| Name | Penstemon apateticus f. triphyllus Straw |
| Authorship | Straw |
| Rank | Forma |
| NomenclaturalStatus | NomLeg |
| Placed in | Penstemon apateticus Straw |
| Citation | 1959 Bol. Soc. Bot. México 24: 44 |
| Holdings | 1 Specimen held in the Harvard University Herbaria identified as Penstemon apateticus f. triphyllus Straw |
| Identification made in | [no date] (1) |
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