Natura - nature actualia - actual entities Mundus Plinius - physical world naturalia - natural bodies ["Regnum Vegetabile" L. (1753), nom. inval. - plant kingdom] see Kingdom Plantae Haeckel (1866) [Class "Tetrandria" L. (1753), nom. inval.] [Order "Tetrandria Monogynia" L. (1753), nom. inval.] [Genus "Ludvigia" L. (1753)] see Genus Ludwigia L. (1753)