Mammillaria hamiltonhoytea (Bravo) Werderm. in Backeberg, Neue Kakteen: 99. 1931
Mammillaria hamiltonhoytea in Backeberg, Neue Kakteen: 99. 1931
is new combination for Neomammillaria hamiltonhoytiae in Anales Inst. Biol. Univ. Nac. México 2: 130. 1931