| Name | Penstemon caespitosus var. perbrevis (Pennell) N. H. Holmgren |
| Authorship | (Pennell) N. H. Holmgren |
| Rank | Variety |
| Placed in | Penstemon caespitosus Nuttall ex A. Gray |
| Citation | 1979 Brittonia 31: 104 |
| Holdings | 8 Specimens held in the Harvard University Herbaria identified as Penstemon caespitosus var. perbrevis (Pennell) N. H. Holmgren |
| Identification made in | [no date] (6), 1946 (2) |
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