Zygocactus obtusangulus (K.Schum.) Loefgr. in Arch. Jard. Bot. Rio de Janeiro 2: 28. 1918
Zygocactus obtusangulus in Arch. Jard. Bot. Rio de Janeiro 2: 28. 1918
is new combination for Cereus obtusangulus, Fl. Bras. 4(2): 198. 1890
Zygocactus obtusangulus in Arch. Jard. Bot. Rio de Janeiro 2: 28. 1918