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6 432098 Ferocactus macrodiscus (Mart.) Britton & Rose (Mart.) Britton & Rose [Echinocactus macrodiscus Mart.]
K.M. Schumann, M Gürke, F. Vaupel, Bl. Kakt., vol. 3 : t. 134 (1900-1905) [J. Pohl]
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