| Name | Diplazium aemulum Underwood & Maxon |
| Authorship | Underwood & Maxon |
| Rank | Species |
| Placed in | Diplazium Swartz |
| Citation | 1902 Bull. Torrey Bot. Club 29: 583 |
| Holdings | 4 Specimens held in the Harvard University Herbaria identified as Diplazium aemulum Underwood & Maxon |
| Identification made in | [no date] (2), 2017 (2) |