| Name | Penstemon attenuatus Douglas ex Lindley |
| Authorship | Douglas ex Lindley |
| Rank | Species |
| NomenclaturalStatus | NomLeg |
| Placed in | Penstemon Schmidel |
| Contains | Penstemon attenuatus subsp. hyacinthinus Pennell Penstemon attenuatus var. militaris (Greene) Cronquist Penstemon attenuatus var. palustris (Pennell) Cronquist Penstemon attenuatus var. pseudoprocerus (Rydberg) Cronquist |
| Citation | 1829 Bot. Reg. 15: t.1295 |
| Holdings | 90 Specimens held in the Harvard University Herbaria identified as Penstemon attenuatus Douglas ex Lindley |
| Identification made in | [no date] (90) |
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