Mammillaria polythele f. quadrispina (Mart.) Schelle, Handb. Kakteenkult.: 260. 1907
Mammillaria polythele f. quadrispina, Handb. Kakteenkult.: 260. 1907
is new combination for Mammillaria quadrispina in Nov. Actorum Acad. Caes. Leop.-Carol. Nat. Cur. 16(1): 329. 1832