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6 695845 Neomammillaria pyrrocephala (Scheidw.) Britton & Rose (Scheidw.) Britton & Rose [Mammillaria pyrrhocephala Scheidw.]
K.M. Schumann, M Gürke, F. Vaupel, Bl. Kakt., vol. 1 : t. 20 (1900-1905) [Toni Gürke]
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