Kingdom Chlorobiota C.Jeffrey ex Doweld (2001) - plants see Subkingdom Viridiplantae Caval.-Sm. (1981)
   Subkingdom Pteridobiotina Britton & A. Br. (1896)
     Superdivision Pteridophytanae Doweld (2001) [monotypic] see Superphylum Pteridophytanae Doweld (2001)
       Division Monilophyta Cantino & Donoghue
         Class Polypodiopsida Cronquist, Takht. & Zimmerm. (1966) - ferns
           a Order Osmundales Bercht. & J.Presl (1820) [monotypic]
           b Order Hymenophyllales Link (1833) [monotypic]
           c Order Gleicheniales Link (1833)
           d Order Salviniales Link (1833) - water ferns
           e Order Schizaeales Schimp. (1869)
           f Order Cyatheales A.B.Frank (1877) - tree ferns
           g Order Polypodiales Link (1833) - cathetogyrates