Natura - nature
   actualia - actual entities
     Mundus Plinius - physical world
       naturalia - natural bodies
         Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
           Clade neomura Cavalier-Smith, 1987
             Domain Eukaryota Chatton, 1925 - eukaryotes
               Clade discaria Cavalier-Smith, 2021
                 Clade natates Cavalier-Smith, 2021
                   Clade photaria Cavalier-Smith, 2021
                     Clade eucorta Cavalier-Smith, 2021
                       Superkingdom Corticata Lankester, 1878 - corticates
                         Kingdom Plantae Haeckel (1866) - plants
                           Subkingdom Viridiplantae Caval.-Sm. (1981) - green plants
                             Infrakingdom Streptophyta Caval.-Sm. (1993)
                               Clade Phragmoplastophyta Lecointre & Le Guyader 2006 [Hall, McCourt, Delwiche, Mishler & Karol 2020]
                                 Clade Embryophytaᵀ Engler 1887 [Mishler & Qiu 2020]
                                   Clade Pan-Tracheophytaᵀ Cantino & Donoghue 2007 [Cantino & Donoghue 2020]
                                     Clade Apo-Tracheophytaᵀ Cantino & Donoghue 2007 [Cantino & Donoghue 2020]
                                       [crown] Phylum Tracheophytaᵀ Sinnott ex Caval.-Sm. (1998) - vascular plants
                                         Clade Pan-Euphyllophytaᵀ Cantino & Donoghue 2007 [Cantino & Donoghue 2020]
                                           Clade Euphyllophytaᵀ Lecointre & Le Guyader 2006 [Cantino & Donoghue 2020]
                                             Subphylum Polypodiophytinaᵀ Reveal (1996) [monotypic]
                                               Class Polypodiopsidaᵀ Cronquist, Takht. & Zimmerm. (1966) - ferns
                                                 Subclass Polypodiidaeᵀ Cronquist, Takht. & Zimmerm. (1966)
                                                   Order Osmundales Bercht. & J.Presl (1820) [monotypic]
                                                     Family Osmundaceaeᵀ 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 †Lunea W.D. Tidwell (1991) [monotypic]
                                                       07 Genus †Osmundacaulis C.N.Mill. (1967)
                                                       08 Genus †Osmundacidites Couper (1953)
                                                       09 Genus †Osmundites Unger (1854), nom. illeg.
                                                       10 Genus †Osmundopsis T.M.Harris (1931)
                                                       11 Genus †Palaeosmunda R.E.Gould (1970)
                                                       12 Genus †Thamnopteris Brongn. (1849)
                                                       13 Genus †Todites Seward (1900)
                                                       14 Genus †Zalesskya Kidst. & Gwynne-Vaughan (1908)
                                                       15 Genus Claytosmunda (Y. Yatabe, N. Murakami & K. Iwatsuki) J.S. Metzgar & G. Rouhan (2016) [monotypic]
                                                       16 Genus Leptopteris C.Presl (1845)
                                                       17 Genus Osmundaᵀ L. (1753)
                                                       18 Genus Osmundastrum C.Presl
                                                       19 Genus Plenasium C.Presl (1836)
                                                       20 Genus Todea Willd. ex Bernh. (1801) [monotypic]