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 Caryophyllanae Takht. (1967) Order Caryophyllalesᵀ Juss. ex Bercht. & J. Presl (1820) Family Polygonaceae Juss. (1789) - buckwheat family Subfamily Polygonoideaeᵀ Tribe Polygoneaeᵀ Genus Pteropyrum Jaubert & Spach (1844)