| Name | Penstemon lyallii (A. Gray) A. Gray |
| Authorship | (A. Gray) A. Gray |
| Rank | Species |
| Placed in | Penstemon Schmidel |
| Citation | 1886 Syn. Fl. N. Amer. (ed. 2) 2(1): 440 |
| Holdings | 29 Specimens held in the Harvard University Herbaria identified as Penstemon lyallii (A. Gray) A. Gray |
| Identification made in | [no date] (28), 1975 (1) |
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