Opuntia microdasys (Lehm.) Pfeiff. Opuntia microdasys (Lehm.) Pfeiff., Enum. Diagn. Cact.: 154. 1837 sec. Hunt 2016≡Cactus microdasys Lehm., Ind. Sem. (Hamburg): 16. 1827 syn. sec. Guzmán & al. 2003