Natura - nature actualia - actual entities Mundus Plinius - physical world naturalia - natural bodies Biota "neomura" Domain Eukaryota Chatton, 1925 - eukaryotes "neokaryotes" - mitochondrial eukaryotes "neozoa" 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)