| Name | Cystopteris fragilis f. simulans Weatherby |
| Authorship | Weatherby |
| Rank | Forma |
| NomenclaturalStatus | NomLeg |
| Placed in | Cystopteris fragilis (Linnaeus) Bernhardi |
| GUID | urn:lsid:ipni.org:names:75690-2 |
| Citation | 1935 Rhodora 37: 376 |
| Holdings | 3 Specimens held in the Harvard University Herbaria identified as Cystopteris fragilis f. simulans Weatherby |
| Identification made in | [no date] (2), 2025 (1) |