Disocactus ackermannii (Haw.) Ralf Bauer Disocactus ackermannii (Haw.) Ralf Bauer in Cactaceae Syst. Init. 17: 17. 2003 sec. Guzmán & al. 2003≡Epiphyllum ackermannii Haw. in Philos. Mag. Ann. Chem. 6: 109. 1829 syn. sec. Guzmán & al. 2003