[Angiospermae] J. Lindley (1830) see Infraphylum Angiospermae auct.
   Monocotyledones see Class Liliopsida Batsch (1802)
     Superorder Commelinanae Takht. (1967) see Order Commelinales Mirb. ex Bercht. & J.Presl (1820)
       Order Hydatellales Cronquist (1980) see Order Nymphaeales Salisb. ex Bercht. & J.Presl (1820)
         Family Hydatellaceae U.Hamann (1976)