Neomammillaria polyedra (Mart.) Britton & Rose
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Neomammillaria polyedra (Mart.) Britton & Rose [ Mammillaria polyedra Mart.] [Cactaceae]
N.L. Britton, J.N. Rose, Cact., vol. 4 : t. 12 (1923) [M.E. Eaton]