Gymnocalycium schickendantzii (F.A.C.Weber) Britton & Rose
      
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2 485942 Gymnocalycium schickendantzii (F.A.C.Weber) Britton & Rose [80 369562 Echinocactus schickendantzii F.A.C.Weber] Cactaceae
N.L. Britton, J.N. Rose, Cact., vol. 3 : t. 19 (1922) [M.E. Eaton]