| Name | Mertensia paniculata var. laevigata (Piper) L. O. Williams |
| Authorship | (Piper) L. O. Williams |
| Rank | Variety |
| NomenclaturalStatus | Unknown |
| Placed in | Mertensia paniculata (Aiton) G. Don |
| Holdings | 3 Specimens held in the Harvard University Herbaria identified as Mertensia paniculata var. laevigata (Piper) L. O. Williams |
| Identification made in | 1936 (2), 1961 (1) |