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6 1009820 Thelocactus leucacanthus (Zucc. ex Pfeiff.) Britton & Rose [125 369256 Echinocactus leucacanthus Zucc. ex Pfeiff.]
L.K.G. Pfeiffer, F. Otto, Abbild. Beschr. Cact. (Coloured version), vol. 1 : p. 14, t. 14 (1839)
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