Heliocereus ackermannii (Haw.) Doweld in Sukkulenty 4(1-2): 42. 2002 ["2001"] Heliocereus ackermannii (Haw.) Doweld in Sukkulenty 4(1-2): 42. 2002 ["2001"]is new combination for Epiphyllum ackermannii Haw. in Philos. Mag. Ann. Chem. 6: 109. 1829Taxon for this nameHeliocereus ackermannii (Haw.) Doweld