Class Equisetopsida C.Agardh (1825) - horsetails see Subclass Equisetidae Warm. (1883) monilophytes - ferns see Clade Monilophyta Cantino & Donoghue 2007 [Doyle, Cantino & Donoghue 2020] Subclass Psilotidae Reveal (1996) see Subclass Ophioglossidae Klinge (1882)