[Tracheophyta] Sinnott ex Caval.-Sm. (1998) - vascular plants
   Polypodiopsida Cronquist, Takht. & Zimmerm. (1966) - ferns
     Polypodiidae Cronquist, Takht. & Zimmerm. (1966)
       Osmundales Bercht. & J.Presl (1820) [monotypic]
         Hymenophyllales Link (1833) [monotypic]
           J Gleicheniales Link (1833)
           K Schizaeales Schimp. (1869)
           L Salviniales Link (1833) - water ferns
           M Cyatheales A.B.Frank (1877) - tree ferns
           N Polypodiales Link (1833) - cathetogyrates