Phylum [Tracheophyta] Sinnott ex Caval.-Sm. (1998) - vascular plants
   Subphylum Polypodiophytina Reveal (1996) [monotypic]
     Class Polypodiopsida Cronquist, Takht. & Zimmerm. (1966) - ferns
       Subclass Polypodiidae Cronquist, Takht. & Zimmerm. (1966)
         Order Cyatheales A.B.Frank (1877) - tree ferns
           18 Family Thyrsopteridaceae C.Presl [monotypic]
           19 Family Loxsomataceae C.Presl (1847)
           20 Family Culcitaceae Pic.Serm. [monotypic]
           21 Family Plagiogyriaceae Bower (1926) [monotypic]
           22 Family Cibotiaceae Korall (2006) [monotypic]
           23 Family Metaxyaceae Pic.Serm. (1970) [monotypic]
           24 Family Dicksoniaceae M.R.Schomb. (1848), nom. cons. - dicksonioids
           25 Family Cyatheaceae Kaulf. (1827) - scaly tree ferns