| Name | Penstemon attenuatus var. palustris (Pennell) Cronquist |
| Authorship | (Pennell) Cronquist |
| Rank | Variety |
| Placed in | Penstemon attenuatus Douglas ex Lindley |
| Citation | 1959 Vasc. Pl. Pacif. N. W. 4: 373 |
| Holdings | 1 Specimen held in the Harvard University Herbaria identified as Penstemon attenuatus var. palustris (Pennell) Cronquist |
| Identification made in | [no date] (1) |
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