Flora van Nederland Haeckel (1866) - plants
   Division Spermatophyta Goebel (1882) see Phylum Spermatophyta Goebel (1882)
     Subdivision Angiospermae J. Lindley (1830) see Infraphylum Angiospermae auct.
       Class Dicotyledones see Class Magnoliopsida Brongn. (1843)
         Order Urticales Dumort. (1829) see Order Rosales Bercht. & J.Presl (1820)
           Family Ulmaceae Mirb. (1815), nom. cons. - elm family
             1 Genus Ulmus L. (1753) - elms