Phylum Magnoliophyta Cronquist, Takht. & Zimmerm. ex Reveal (1996) see Infraphylum Angiospermae auct.
   Class Magnoliopsida Brongn. (1843)
     Subclass Caryophyllidae Takht. (1967) see Order Caryophyllales Juss. ex Bercht. & J.Presl (1820)
       Superorder Caryophyllanae Takht. (1967)
         Order Caryophyllales Juss. ex Bercht. & J.Presl (1820)
           Suborder Portulacineae Engl. (1898) see Order Caryophyllales Juss. ex Bercht. & J.Presl (1820)
             Family Cactaceae Juss. (1789), nom. cons. - cactus family
               Subfamily Cactoideae K. Schumann
                 Tribe Cacteae Rchb. (1832)
                   1 Genus Echinocactus Link & Otto (1827)
                   2 Genus Lophophora J.M. Coulter (1894)
                   3 Genus Ferocactus N.L. Britton & J.N. Rose (1922)
                   4 Genus Mammillaria Haw. (1812), nom. cons.