plants Haeckel (1866) - plants
   Division Charophyta Migula (1889) - charophyte algae and embryophytes see charophytes
     Subdivision [Streptophytina] see [unranked] Streptophytina Lewis & McCourt (2004)
       Class Equisetopsida C.Agardh (1825) - horsetails see Subclass Equisetidae Warm. (1883)
         Vascular Plants see Phylum Tracheophyta Sinnott ex Caval.-Sm. (1998)
           [Ferns]
             Subclass Polypodiidae Cronquist, Takht. & Zimmerm. (1966)
               Order Salviniales Link (1833) - water ferns
                 Family Marsileaceae Mirb. (1802) - clover ferns
                   1 Genus Marsilea L. (1753)
                   2 Genus Pilularia L. (1753)
                   3 Genus Regnellidium Lindm. (1904)