Kingdom Chlorobiota C.Jeffrey ex Doweld (2001) - plants see Subkingdom Viridiplantae Caval.-Sm. (1981)
   Subkingdom Pteridobiotina Britton & A. Br. (1896)
     Superdivision Pteridophytanae Doweld (2001) [monotypic] see Superphylum Pteridophytanae Doweld (2001)
       Division Monilophyta Cantino & Donoghue
         Class Polypodiopsida Cronquist, Takht. & Zimmerm. (1966) - ferns
           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)
               4 Genus †Regnellites T.Yamada & M.Kato (2002)
               5 Genus †Rodeites Sahni (1943)