| Name | Penstemon serrulatus Menzies ex Smith |
| Authorship | Menzies ex Smith |
| Rank | Species |
| Placed in | Penstemon Schmidel |
| Citation | 1814 Cycl. [Rees] 26(2): Pentstemon no. 5 |
| Holdings | 74 Specimens held in the Harvard University Herbaria identified as Penstemon serrulatus Menzies ex Smith |
| Identification made in | [no date] (74) |
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