Oreocereus
Oreocereus in Boll. Reale Orto Bot. Palermo 8: 258. 1909 sec. Hunt 2006
- ≡Cereus subg. Oreocereus in Rep. (Annual) Missouri Bot. Gard. 16: 64. 1905 syn. sec. Hernández-Ledesma & al. 2015
- Type: Oreocereus celsianus
- =Arequipa, Cactaceae 3: 100. 1922 syn. sec. Hunt 2006
- Type: Arequipa leucotricha
- =Morawetzia in Jahrb. Deutsch. Kakteen-Ges. 1: 73. 1936 syn. sec. Hunt 2006
- Type: Morawetzia doelziana
- =Arequipiopsis in Repert. Spec. Nov. Regni Veg. 50: 198. 1941 syn. sec. Hunt 2006
- Type: Arequipiopsis hempeliana