Natura - nature
   actualia - actual entities
     Mundus Plinius - physical world
       naturalia - natural bodies
         Biota
           "neomura"
             Domain Eukaryota Chatton, 1925 - eukaryotes
               neokaryotes Cavalier-Smith 1993 - mitochondrial eukaryotes
                 neozoa Cavalier-Smith 1993
                   Superkingdom Corticata Lankester, 1878
                     Kingdom Plantae Haeckel (1866) - plants
                       Subkingdom Viridiplantae Caval.-Sm. (1981) - green plants
                         Infrakingdom Streptophyta C. Jeffrey (1967)
                           Superphylum Embryophyta
                             "polysporangiophytes"
                               Phylum Tracheophyta Sinnott ex Caval.-Sm. (1998) - vascular plants
                                 [Subphylum] Euphyllophytina
                                   Infraphylum "Radiatopses" Kenrick & Crane (1997)
                                     "lignophytes"
                                       Class Spermatopsida
                                         "core seed plants"
                                           Subclass Magnoliidae Novák ex Takht. (1967) - angiosperms
                                             "core angiosperms"
                                               "eudicots"
                                                 "core eudicots"
                                                   Superorder Rosanae Takht. (1967)
                                                     "fabids"
                                                       Order Rosales Bercht. & J. Presl (1820)
                                                         Family Ulmaceae Mirb. (1815) - elm family
                                                           1 Genus Ulmus L. (1753) - elms
                                                           2 Genus Holoptelea J.E. Planchon (1848)
                                                           3 Genus Hemiptelea J.E. Planchon (1872)
                                                           4 Genus Zelkova Spach, 1841, nom. cons.
                                                           5 Genus Planera J.F. Gmelin (1791)
                                                           6 Genus Phyllostylon Capanema ex Bentham & J.D. Hooker (1880)
                                                           7 Genus Ampelocera Klotzsch (1847)