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
           Order Osmundales Bercht. & J.Presl (1820) [monotypic]
             Family Osmundaceae Martinov (1820)
               01 Genus †Anomopteris Brongn. (1828)
               02 Genus †Aurealcaulis W.D. Tidwell & L.R.Parker (1987)
               03 Genus †Chasmatopteris Zalessky (1931)
               04 Genus †Donwelliacaulis Ash (1994)
               05 Genus †Guairea R.Herbst (1981)
               06 Genus Leptopteris C.Presl (1845)
               07 Genus †Luneajonesii A.V.Novikov & B. Barabasz-Krasny (2015), orth. inval. see Genus Lunea W.D. Tidwell (1991)
               08 Genus Osmunda L. (1753)
               09 Genus †Osmundacaulis C.N.Mill. (1967)
               10 Genus †Osmundacidites Couper (1953)
               11 Genus Osmundastrum C.Presl
               12 Genus †Osmundites Unger (1854), nom. illeg.
               13 Genus Todea Willd. ex Bernh. (1801)
               14 Genus †Osmundopsis T.M.Harris (1931)
               15 Genus †Paleosmunda orth. inval. see Genus Palaeosmunda R.E.Gould (1970)
               16 Genus †Thamnopteris Brongn. (1849)
               17 Genus †Todites Seward (1900)
               18 Genus †Zalesskya Kidst. & Gwynne-Vaughan (1908)