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12 278380 Coryphantha clavata (Scheidw.) Backeb. (Scheidw.) Backeb. [Mammillaria radicantissima Quehl]
K.M. Schumann, M Gürke, F. Vaupel, Bl. Kakt., vol. 3 : t. 163 (1900-1905) [J. Pohl]
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