| Name | Alnus rugosa f. hypomalaca Fernald |
| Authorship | Fernald |
| Rank | Forma |
| NomenclaturalStatus | NomLeg |
| Placed in | Alnus rugosa (Du Roi) Sprengel |
| GUID | urn:lsid:ipni.org:names:301788-2 |
| Citation | 1945 Rhodora 47: 353 |
| Holdings | 2 Specimens held in the Harvard University Herbaria identified as Alnus rugosa f. hypomalaca Fernald |
| Identification made in | [no date] (2) |