| Name | Penstemon rattanii subsp. kleei (Greene) D. D. Keck | 
| Authorship | (Greene) D. D. Keck | 
| Rank | Subspecies | 
| NomenclaturalStatus | Unknown | 
| Placed in | Penstemon rattanii A. Gray | 
| Holdings | 1 Specimen held in the Harvard University Herbaria identified as Penstemon rattanii subsp. kleei (Greene) D. D. Keck | 
| Identification made in | [no date] (1) |