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 Enneandria L. (1735), nom. inval. see Class Enneandria L. (1753), nom. inval.
                   Order Enneandria Trigynia L. (1735), nom. inval. see Order Enneandria Trigynia L. (1753), nom. inval.
                     1 Genus Rheum nom. inval. see Genus Rheum L. (1753)
                     1.0 Genus Rhabarbarum Tourn., nom. inval. see Genus Rheum nom. inval.