Mammillaria dioica var. multidigitata (Radley ex G.E.Linds.) Neutel. in Succulenta (Netherlands) 65: 119. 1986
Mammillaria dioica var. multidigitata in Succulenta (Netherlands) 65: 119. 1986
is new combination for Mammillaria multidigitata in Cact. Succ. J. (Los Angeles) 19: 152, f. 99–101. 1947