| Name | Mertensia platyphylla var. subcordata (Greene) L. O. Williams |
| Authorship | (Greene) L. O. Williams |
| Rank | Variety |
| Placed in | Mertensia platyphylla A. Heller |
| Citation | 1937 Ann. Missouri Bot. Gard. 24(1): 60 |
| Holdings | 24 Specimens held in the Harvard University Herbaria identified as Mertensia platyphylla var. subcordata (Greene) L. O. Williams |
| Identification made in | [no date] (24) |