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)] [Cryptophyta Link (1824)] [Order Algae L. (1753)] [Genus Byssus L. (1753), nom. rej. prop.] see Genus Trentepohlia Mart. (1817), nom. cons. [Byssus minima Scop.]