| Name | Euthamia leptocephala (Torrey & A. Gray) Greene ex Porter & Britton |
| Authorship | (Torrey & A. Gray) Greene ex Porter & Britton |
| Rank | Species |
| Placed in | Euthamia (Nuttall) Cassini |
| Citation | 1894 Mem. Torrey Bot. Club 5: 231 |
| Holdings | 3 Specimens held in the Harvard University Herbaria identified as Euthamia leptocephala (Torrey & A. Gray) Greene ex Porter & Britton |
| Identification made in | 2018 (3) |