Neomammillaria mystax (Mart.) Britton & Rose, Cactaceae 4: 92–94, f. 89, f. 5. 1923
Neomammillaria mystax, Cactaceae 4: 92–94, f. 89, f. 5. 1923
is new combination for Mammillaria mystax in Nova Acta Phys.-Med. Acad. Caes. Leop.-Carol. Nat. Cur. 16(1): 332, pl. 21. 1832