| Name | Mertensia longiflora var. horneri J. F. Macbride |
| Authorship | J. F. Macbride |
| Rank | Variety |
| Placed in | Mertensia longiflora Greene |
| GUID | urn:lsid:ipni.org:names:157808-2 |
| Citation | 1916 Contr. Gray Herb. 48: 17 |
| Holdings | 1 Specimen held in the Harvard University Herbaria identified as Mertensia longiflora var. horneri J. F. Macbride |
| Identification made in | [no date] (1) |