vascular plants see Phylum Tracheophyta Sinnott ex Caval.-Sm. (1998)
   euphyllophytes see Clade Euphyllophyta Lecointre & Le Guyader 2006 [Cantino & Donoghue 2020]
     monilophytes - ferns see Clade Monilophyta Cantino & Donoghue 2007 [Doyle, Cantino & Donoghue 2020]
       Class Polypodiopsida Cronquist, Takht. & Zimmerm. (1966) - ferns
         core leptosporangiates
           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)