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6 924244 Sclerocactus scheeri (Salm-Dyck) N.P. Taylor (Salm-Dyck) N.P. Taylor [Ancistrocactus scheeri (Salm-Dyck) Britton & Rose]
N.L. Britton, J.N. Rose, Cact., vol. 4 : t. 2 (1923) [M.E. Eaton]
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