Elodea Michx. genus accepted

Aschersonia F.Muell. ex Benth., 1878 genus doubtful

Serpicula L.f. genus synonym

Fluvialis Ség. genus synonym

Herpophyllum Zanardini genus accepted

Helodes St.-Lag. genus doubtful

Thalassia Banks ex J.Koenig, 1805 genus doubtful

Ixia Muhl. ex Spreng. genus synonym

Lemnopsis Zipp. ex Zoll. genus synonym

Naias Juss., 1789 genus doubtful

Appertiella C.D.K.Cook & L.Triest genus accepted

Tripteranthus genus accepted

Hydrocharites C.O.Weber, 1855 genus accepted

Stratiotites Heer, 1855 genus accepted

Sphaenophora Massalongo, 1851 genus accepted

Cymodoceites E.Bureau, 1886 genus accepted

Najadopsis Heer, 1855 genus accepted

Najadonium Ettingshausen, 1872 genus accepted

Benedictaea Toledo genus synonym

Xystrolobus Gagnepain genus synonym

Carpolithus Brongniart, 1822 genus synonym

Carpolites Sternberg, 1838 genus synonym

Fluvialis Mich. ex Adans., 1763 genus doubtful

Hydrochaeris G.Gaertn., B.Mey. & Scherb., 1801 genus doubtful

Hydromystria G.Mey. genus synonym

Saivala Jones, 1799 genus accepted

Enalus Asch. & Garcke genus accepted

Hydrocharella Spruce ex Rohrb. genus accepted

Luchia Steud., 1841 genus accepted

Boottia Wall. genus synonym

Leptanthes Wight ex Wall. genus accepted

Serpicula Pursh genus synonym

Sahniophyllum C.Chinnappa & A.Rajanikanth, 2021 genus doubtful

Thalassia Banks & Sol. ex K.D.Koenig genus accepted

Stratiotes L. genus accepted

Vallisneria P.Micheli ex L. genus accepted

Blyxa Noronha ex Thouars genus accepted

Diplandra Bertero genus synonym

Caulinia Willd. genus synonym

Hymenotheca Salisb. genus synonym

Udora Nutt. genus synonym

Apalanthe Planch. genus synonym

Lagarosiphon Harv. genus accepted

Hydrotrophus C.B.Clarke genus synonym

Rhizakenia Raf. genus synonym

Anacharis Rich. genus synonym

Nechamandra Planch. genus accepted

Hydora Besser genus synonym

Egeria Planch. genus synonym

Philotria Raf. genus synonym

Hydrocharis L. genus accepted

Hydrospondylus Hassk. genus synonym

Epigynanthus Blume genus synonym

Najas L. genus accepted

Oligolobos Gagnep. genus synonym

Hydrilla Rich. genus accepted

Jalambicea (Cerv.) Cerv. genus synonym

Halophila Thouars genus accepted

Trianea H.Karst. genus synonym

Enhydrias Ridl. genus synonym

Physkium Lour. genus synonym

Schizotheca Ehrenb. genus synonym

Beneditaea Toledo genus synonym

Maidenia Rendle genus synonym

Barkania Ehrenb. genus synonym

Diplosiphon Decne. genus synonym

Enhalus Rich. genus accepted

Xystrolobos Gagnep. genus synonym

Ittnera C.C.Gmel. genus synonym

Damasonium Schreb. genus synonym

Aglae Dulac, 1867 genus synonym

Aloides Fabr., 1759 genus doubtful

Hydromistria Bartl. genus doubtful

Nayas Neck., 1790 genus doubtful

Valisneria Scop. genus doubtful

Helodea genus synonym

Jalombicea Steud., 1840 genus doubtful

Blyxopsis Kuntze genus synonym

Stratioites Gilib., 1792 genus doubtful

Diplosyphon Matsum. genus doubtful

Hydrocharella Spruce genus doubtful

Hydrochariphyllum Z.Kvacek, 1995 genus doubtful

Thalassia Banks genus doubtful

Hydrocharella Spruce ex Benth. & Hook.f. genus synonym

Cavolinia Raf., 1818 genus doubtful

Ottelia Pers. genus accepted

Limnobium Rich. genus synonym

Ottelia R.Hedw., 1806 genus doubtful

Fluvialis Persoon, 1807 genus synonym

Thalassites A.Benzecry & S.D.Brack-Hanes, 2008 genus accepted