Phylum Magnoliophyta Cronquist, Takht. & Zimmerm. ex Reveal (1996) see Infraphylum Angiospermae auct.
   Class Liliopsida Batsch (1802) see Class Magnoliopsida Brongn. (1843)
     Subclass Alismatidae Takht. (1967) see Order Alismatales R.Br. ex Bercht. & J.Presl (1820)
       Superorder Alismatanae Takht. (1967) see Order Alismatales R.Br. ex Bercht. & J.Presl (1820)
         Order Hydrocharitales Dumort. (1829) see Order Alismatales R.Br. ex Bercht. & J.Presl (1820)
           Family Hydrocharitaceae Juss. (1789), nom. cons. - tape-grass family
             01 Genus Ottelia Persoon (1805)
             02 Genus Oligolobus nom. null. see Genus Oligolobos Gagnepain (1907)
             03 Genus Stratiotes L. (1753)
             04 Genus Hydromystria see Genus Limnobium Rich. (1814)
             05 Genus Limnobium Rich. (1814)
             06 Genus Hydrocharis L. (1753)
             07 Genus Enhalus Rich. (1814)
             08 Genus Nechamandra Planchon (1849)
             09 Genus Blyxa Noronha ex Thouars (1806)
             10 Genus Enhydrias Ridley (1900) see Genus Blyxa Noronha ex Thouars (1806)
             11 Genus Vallisneria L. (1753)
             12 Genus Hydrilla Rich. (1814)
             13 Genus Egeria Planch. (1849)
             14 Genus Elodea Michx. (1803)
             15 Genus Apalanthe Planch. (1848)
             16 Genus Lagarosiphon Harv. (1841)
             17 Genus Maidenia Rendle (1916)
             18 Genus Appertiella C.D.K. Cook & L. Triest, in J.J. Symoens et al. (1982)