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 Salviniaceae Martinov (1820) - floating ferns Genus Azolla Lam. (1783)