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.
                   [Pulverulentæ] see Genus Lepra F.H. Wigg. (1780), nom. illeg.
                     [Byssus antiquitatis L. (1753)] see Lepra antiquitatis