[plants] Haeckel (1866) - plants
   vascular plants see Phylum Tracheophyta Sinnott ex Caval.-Sm. (1998)
     euphyllophytes see Clade Euphyllophyta Lecointre & Le Guyader 2006 [Cantino & Donoghue 2020]
       "Moniliformopses" Kenrick & P.R.Crane (1997), nom. inval. - ferns see Infraphylum Moniliformopses Kenrick & P.R.Crane (1997), nom. inval.
         1 Class Psilotopsida D.H.Scott (1909) see Subclass Ophioglossidae Klinge (1882)
         2 Class Equisetopsida C.Agardh (1825) - horsetails see Subclass Equisetidae Warm. (1883)
         3 Class Marattiopsida Doweld (2001) see Subclass Marattiidae Klinge (1882)
         4 Class Polypodiopsida Cronquist, Takht. & Zimmerm. (1966) - ferns