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6 351757 Discocactus placentiformis (Lehm.) Schumann [125 171896 Cactus placentiformis Lehm.]
Nova Acta Phys.-Med. Acad. Caes. Leop.-Carol. Nat. Cur., vol. 19(1): (Elfter Band): t. 15 (1839) [L. Pfeiffer]
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