Natura - nature
   Universum - universe see [unranked] Mundus Plinius
     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)