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)]
               1 [Fungi (Jahn & Jahn, 1959)]
               2 [Order Algae L. (1753)]
               3 [Order Lichenes]