| Name | Penstemon fruticiformis var. incertus (Brandegee) Munz & I. M. Johnston |
| Authorship | (Brandegee) Munz & I. M. Johnston |
| Rank | Variety |
| Placed in | Penstemon fruticiformis Coville |
| Holdings | 2 Specimens held in the Harvard University Herbaria identified as Penstemon fruticiformis var. incertus (Brandegee) Munz & I. M. Johnston |
| Identification made in | [no date] (2) |
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