Natura - nature
   actualia - actual entities
     Mundus Plinius - physical world
       naturalia - natural bodies
         Biota
           "neomura"
             Domain Eukaryota Chatton, 1925 - eukaryotes
               "neokaryotes" - mitochondrial eukaryotes
                 "neozoa"
                   Superkingdom Corticata Lankester, 1878
                     Kingdom Plantae Haeckel (1866) - plants
                       Subkingdom Viridiplantae Caval.-Sm. (1981) - green plants
                         Infrakingdom Streptophyta C. Jeffrey (1967)
                           Superphylum Embryophyta
                             "polysporangiophytes"
                               Phylum Tracheophyta Sinnott ex Caval.-Sm. (1998) - vascular plants
                                 Subphylum Euphyllophytina
                                   Infraphylum "Moniliformopses" Kenrick & Crane, 1997, nom. inval. - monilophytes
                                     Class Polypodiopsida Cronquist, Takht. & Zimmerm. (1966) - ferns
                                       "core leptosporangiates"
                                         Order Polypodiales Link (1833) - polypods
                                           "eupolypods"
                                             "eupolypods I"
                                               Family Polypodiaceae Bercht. & J. Presl (1820) - polygrams
                                                 1 Genus Caobangia A.R. Smith & X.C. Zhang (2002)
                                                 2 Genus Gymnogrammitis Griffith (1849)
                                                 3 Genus Kontumia
                                                 4 Genus Pleurosoriopsis Fomin (1930)
                                                 5 Subfamily Platycerioideae
                                                 6 Subfamily Polypodioideaeᵀ
                                                 7 "grammitids"