living organisms see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Superkingdom Eukaryotae see Domain Eukaryota Chatton, 1925
     Kingdom Plantae Haeckel (1866) - plants
       Subkingdom Embryobionta Cronquist, Takht. & W.Zimm.
         Division Filicophyta see Phylum Pterophyta
           Subdivision Filicopsida Pfefferkorn (1976) see Class Filicopsida C.Agardh (1822)
             Order Filicales Dumort. (1829), nom. illeg. see Order Polypodiales Link (1833)
               Family Dennstaedtiaceae Lotsy (1909) - dennstaedtioids
                 Genus Pteridium Gled. ex Scop. (1760), nom. cons. - bracken
                   Pteridium aquilinum (L.) Kuhn (1879) - bracken