Natura - nature
   actualia - actual entities
     Mundus Plinius - physical world
       naturalia - natural bodies
         ["Vegetabile Regnum" nom. inval. - plant kingdom] see Kingdom Plantae Haeckel (1866)
           ["Publicae"]
             ["Monoclinia"]
               ["Diffinitas"]
                 ["Indifferentismus"]
                   [Class "Pentandria" L. (1735), nom. inval.] see Class Pentandria L. (1753), nom. inval.
                     [Order "Pentandria Digynia" L. (1735), nom. inval.] see Order Pentandria Digynia L. (1753), nom. inval.
                       ["Corollae lobi oblique dextrorsum flexi"]
                         1 [Genus "Stapelia" nom. inval.] see Genus Stapelia L. (1753)
                         2 [Genus "Asclepias" nom. inval.] see Genus Asclepias L. (1753)
                         3 [Genus "Periploca" nom. inval.] see Genus Periploca L. (1753)
                         4 [Genus "Cynanchum" nom. inval.] see Genus Cynanchum L. (1753)
                         5 [Genus "Apocynum" nom. inval.] see Genus Apocynum L. (1753)