| Name | Penstemon arkansanus Pennell |
| Authorship | Pennell |
| Rank | Species |
| NomenclaturalStatus | NomLeg |
| Placed in | Penstemon Schmidel |
| Contains | Penstemon arkansanus var. pubescens Pennell |
| GUID | urn:lsid:ipni.org:names:807842-1 |
| Citation | 1922 Proc. Acad. Nat. Sci. Philadelphia 73: 493 |
| Holdings | 58 Specimens held in the Harvard University Herbaria identified as Penstemon arkansanus Pennell |
| Identification made in | [no date] (54), 1931 (2), 1934 (2) |
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