Domain Eucaryota
   Subdomain Chlorota Doweld (2001)
     Kingdom Chlorobiota C.Jeffrey ex Doweld (2001) - plants see Subkingdom Viridiplantae Caval.-Sm. (1981)
       Subkingdom Pteridobiotina Britton & A. Br. (1896)
         Superphylum Pteridophytanae Doweld (2001)
           Phylum Pteridophyta Schimp. (1879) see Phylum Filicinophyta
             Class Pteridopsida Ritgen (1828) see Order Polypodiales Link (1833)
               Subclass Polypodiidae Cronquist, Takht. & Zimmerm. (1966)
                 Order Aspleniales Pic. Serm. ex Reveal (1996) [monotypic] see Order Polypodiales Link (1833)
                   Family Aspleniaceae Newman (1840) - spleenworts