Phylum Magnoliophyta Cronquist, Takht. & Zimmerm. ex Reveal (1996) see Infraphylum Angiospermae auct.
   Class Magnoliopsida Brongn. (1843)
     Subclass Dilleniidae Takht. ex Reveal & Tahkt. (1993) see Order Dilleniales DC. ex Bercht. & J.Presl (1820)
       Superorder Urticanae Takht. ex Reveal (1992) see Order Rosales Bercht. & J.Presl (1820)
         Order Urticales Dumort. (1829) see Order Rosales Bercht. & J.Presl (1820)
           Family Ulmaceae Mirb. (1815), nom. cons. - elm family
             Subfamily Celtidoideae Engl. see Family Cannabaceae Martinov (1820), nom. cons.
               1 Genus Ampelocera Klotzsch (1847)
               2 Genus Chaetachme Planchon (1848)
               3 Genus Gironniera Gaudich. (1844)
               4 Genus Aphananthe Planch. (1848), nom. cons.
               5 Genus Celtis L. (1753) - nettle tree
               6 Genus Pteroceltis Maxim. (1873)
               7 Genus Trema Loureiro (1790)
               8 Genus Parasponia Miquel (1851)
               9 Genus Lozanella Greenman (1905)