Neomammillaria gigantea (Hildm. ex Schumann) Britton & Rose
      
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2 695728 Neomammillaria gigantea (Hildm. ex Schumann) Britton & Rose [80 639028 Mammillaria gigantea Hildm. ex Schumann] Cactaceae
N.L. Britton, J.N. Rose, Cact., vol. 4 : t. 11 (1923) [D.G. Passmore]