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)
           1 Family Hydrocharitaceae Juss. (1789), nom. cons. - tape-grass family
           1.0.1 Family Elodeaceae Dumort. (1829) see Subfamily Anacharidioideae nom. null.
           1.0.2 Family Stratiotaceae Link (1829) see Subfamily Stratioideae
           1.0.3 Family Vallisneriaceae Link (1829) see Subfamily Hydrilloideae
           2 Family Thalassiaceae Nakai (1943) see Subfamily Hydrilloideae
           3 Family Halophilaceae J.Agardh (1858) see Subfamily Hydrilloideae