vascular plants see Phylum Tracheophyta Sinnott ex Caval.-Sm. (1998)
   euphyllophytes see Clade Euphyllophyta Lecointre & Le Guyader 2006 [Cantino & Donoghue 2020]
     monilophytes - ferns see Clade Monilophyta Cantino & Donoghue 2007 [Doyle, Cantino & Donoghue 2020]
       1 Class Psilotopsida D.H.Scott (1909) see Subclass Ophioglossidae Klinge (1882)
       2.1 Class Equisetopsida C.Agardh (1825) - horsetails see Subclass Equisetidae Warm. (1883)
       2.2 Class Marattiopsida Doweld (2001) see Subclass Marattiidae Klinge (1882)
       2.3 Class Polypodiopsida Cronquist, Takht. & Zimmerm. (1966) - ferns