Epiphyllum oxypetalum (DC.) Haw. [ Cereus latifrons Zucc.]
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Epiphyllum oxypetalum (DC.) Haw. [ Cereus latifrons Zucc.] [Cactaceae]
L.K.G. Pfeiffer, F. Otto, Abbild. Beschr. Cact. (Coloured version), vol. 1 : p. 10, t. 10, fig. A (1839)