Systema naturæ - nature
   Universum - universe see [unranked] Mundus Plinius
     naturalia - natural bodies
       Regnum Vegetabile L. (1735), nom. inval. - plant kingdom see Kingdom Plantae Haeckel (1866)
         Publicæ
           Monoclinia
             Diffinitas
               Indifferentismus
                 Class Polyandria L. (1735), nom. inval. see Class Polyandria L. (1753), nom. inval.
                   Order Polyandria Monogynia L. (1735), nom. inval. see Order Polyandria Monogynia L. (1753), nom. inval.
                     Calice Tabescente
                       1 Genus Euphorbium nom. inval. see Genus Euphorbia nom. inval.
                       2 Genus Cereus nom. inval. see Genus Cactus nom. inval.
                       3 Genus Opuntia Tourn., nom. inval. see Genus Cactus nom. inval.
                       3.0 Genus Tuna J.J. Dillenius, nom. inval. see Genus Cactus nom. inval.
                       4 Genus Cactus nom. inval. see Genus Cactus L. (1753)
                       4.0 Genus Melocactus Tourn., nom. inval. see Genus Cactus nom. inval.