| Name | Alnus incana subsp. tenuifolia (Nuttall) Breitung |
| Authorship | (Nuttall) Breitung |
| Rank | Subspecies |
| NomenclaturalStatus | Unknown |
| Placed in | Alnus incana (Linnaeus) Moench |
| GUID | urn:lsid:ipni.org:names:9425-2 |
| Holdings | 337 Specimens held in the Harvard University Herbaria identified as Alnus incana subsp. tenuifolia (Nuttall) Breitung |
| Identification made in | [no date] (334), 1956 (2), 1963 (1) |