| Name | Penstemon retrorsus Payson |
| Authorship | Payson |
| Rank | Species |
| Placed in | Penstemon Schmidel |
| Citation | 1920 Contr. U.S. Natl. Herb. 20: 373 |
| Holdings | 2 Specimens held in the Harvard University Herbaria identified as Penstemon retrorsus Payson |
| Identification made in | [no date] (1), 1936 (1) |
Copyright © 2013 The President and Fellows of Harvard College | Accessibility