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" Superorder Lilianae Takht. (1967) - monocots Order Alismatales R. Br. ex Bercht. & J. Presl (1820) 1.1 Family Acoraceae Martinov (1820) 1.2 Family Araceae Juss. (1789) - Arum family 2 Family Tofieldiaceae Takht. (1995) 3 Family Alismataceaeᵀ Vent. (1799) - water-plantain family 4 Family Butomaceae Mirb. (1804) [monotypic] - flowering rush family 5 Family Hydrocharitaceae Juss. (1789) - tape-grass family 6 Family Scheuchzeriaceae F. Rudolphi (1830) [monotypic] 7 Family Aponogetonaceae Planch. (1856), nom. cons. - Cape-pondweed family 8 Family Juncaginaceae Rich. (1808) - arrow-grass family 9.1 Family Posidoniaceae Vines (1895), nom. cons. 9.2 Family Ruppiaceae Horan. (1834), nom. cons. [monotypic] - ditch-grass family 9.3 Family Cymodoceaceae Vines (1895), nom. cons. - Cymodocea family 9.4 Family Potamogetonaceae Bercht. & J. Presl (1823) - pondweed family 9.5 Family Zosteraceae Dumort. (1829), nom. cons.