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 Cryptogamia L. (1753)] [Order "Hydopterides" Willd. (1810), nom. inval.] see Order Hydropterides Willd. (1802)