organisms see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Domain Eukaryota Chatton, 1925 - eukaryotes
     Kingdom Plantae Haeckel (1866) - plants
       Subkingdom Viridaeplantae Cavalier-Sm. (1981) - green plants see [unranked] Viridiplantae Cavalier-Smith, 1981
         Land plants
           Phylum Pteridophyta Schimp. (1879) see Phylum Filicinophyta
             leptosporangiates - leptosporangiate ferns
               Order Polypodiales Link (1833) - cathetogyrates
                 eupolypod families
                   1 Family Onocleaceae Pic.Serm. (1970) - onocleoids
                   2 Family Blechnaceae Newman (1844) - blechnoids
                   3 Family Polypodiaceae J.Presl & C.Presl (1822) - polygrams