| Name | Alnus jorullensis var. exigua Fernald |
| Authorship | Fernald |
| Rank | Variety |
| NomenclaturalStatus | NomLeg |
| Placed in | Alnus jorullensis Kunth |
| GUID | urn:lsid:ipni.org:names:9429-2 |
| Citation | 1904 Proc. Amer. Acad. Arts 40: 27 |
| Holdings | 1 Specimen held in the Harvard University Herbaria identified as Alnus jorullensis var. exigua Fernald |
| Identification made in | [no date] (1) |