| Name | Athyrium angustum f. confertum Butters |
| Authorship | Butters |
| Rank | Forma |
| NomenclaturalStatus | NomLeg |
| Placed in | Athyrium angustum (Willdenow) C. Presl |
| GUID | urn:lsid:ipni.org:names:26103-2 |
| Holdings | 2 Specimens held in the Harvard University Herbaria identified as Athyrium angustum f. confertum Butters |
| Identification made in | [no date] (2) |
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