Coryphantha pycnacantha (Mart.) Lemaire [ Mammillaria pycnacantha Mart.]
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Coryphantha pycnacantha (Mart.) Lemaire [ Mammillaria pycnacantha Mart.] [Cactaceae]
W. Curtis, Bot. Mag., vol. 69 [ser. 2, vol. 16]: t. 3972 (1843) [W.H. Fitch]