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"]
               ["Affinitas"]
                 [Class "Polyadelphia" L. (1735), nom. inval.] see Class Polyadelphia L. (1753), nom. inval.
                   [Order "Polyadelphia Icosandria" nom. inval.] see Order Polyadelphia Icosandria L. (1753), nom. inval.
                     [Genus "Citrus" nom. inval.] see Genus Citrus L. (1753)