Water Ferns (Salviniales) also commonly known as Heterosporous Ferns, is a biological order of the phylum Tracheophyta (Vascular Plants) and class Polypodiopsida (Leptosporangiate Ferns).
Marsileaceae
Salviniaceae
Azollaceae
Equisetales
Hymenophyllales
Gleicheniales
Marattiales
Ophioglossales
Osmundales
Polypodiales
Psilotales
Schizaeales
Cyatheales
Salviniales