| Name | Penstemon fruticosus var. serratus (D. D. Keck) Cronquist |
| Authorship | (D. D. Keck) Cronquist |
| Rank | Variety |
| Placed in | Penstemon fruticosus (Pursh) Greene |
| Citation | 1959 Vasc. Pl. Pacif. N. W. 4: 385 |
| Holdings | 18 Specimens held in the Harvard University Herbaria identified as Penstemon fruticosus var. serratus (D. D. Keck) Cronquist |
| Identification made in | [no date] (18) |
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