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6 278522 Coryphantha pycnacantha (Mart.) Lemaire (Mart.) Lemaire [Mammillaria pycnacantha Mart.]
W. Curtis, Bot. Mag., vol. 69 [ser. 2, vol. 16] (t. 3964-4047): t. 3972 (1801) [W.H. Fitch]
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