vascular plants see Phylum Tracheophyta Sinnott ex Caval.-Sm. (1998)
   euphyllophytes see Subphylum Euphyllophytina
     monilophytes - ferns see Infraphylum Moniliformopses Kenrick & Crane, 1997, nom. inval.
       1 Class Psilotopsida D.H. Scott (1909)
       2.1 Class Equisetopsida C. Agardh (1825) - horsetails
       2.2 Class Marattiopsida Doweld (2001)
       2.3 Class Polypodiopsida Cronquist, Takht. & Zimmerm. (1966) - ferns