| Name | Heuchera villosa var. macrorhiza (Small) Rosend., Butters & Lakela |
| Authorship | (Small) Rosend., Butters & Lakela |
| Rank | Variety |
| Placed in | Heuchera villosa Michaux |
| Citation | 1936 Minnesota Stud. Pl. Sci. 2: 31 |
| Holdings | 32 Specimens held in the Harvard University Herbaria identified as Heuchera villosa var. macrorhiza (Small) Rosend., Butters & Lakela |
| Identification made in | [no date] (27), 1970 (5) |