Neomammillaria amoena (Hoppfer ex Salm-Dyck) Britton & Rose
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Neomammillaria amoena (Hoppfer ex Salm-Dyck) Britton & Rose [ Mammillaria amoena Hoppfer ex Salm-Dyck] [Cactaceae]
N.L. Britton, J.N. Rose, Cact., vol. 4 : t. 12 (1923) [M.E. Eaton]