Phylum Magnoliophyta Cronquist, Takht. & Zimmerm. ex Reveal (1996) see Infraphylum Angiospermae auct.
   Class Magnoliopsida Brongn. (1843)
     Subclass Nymphaeidae J.W. Walker ex Takht. (1997) see Order Nymphaeales Salisb. ex Bercht. & J.Presl (1820)
       Superorder Nymphaeanae Thorne ex Reveal (1992)
         Order Hydropeltidales Spenn. (1834) see Order Nymphaeales Salisb. ex Bercht. & J.Presl (1820)
           1 Family Hydropeltidaceae Dumort. (1822) see Family Cabombaceae Rich. ex A.Rich. (1822), nom. cons.
           2 Family Cabombaceae Rich. ex A.Rich. (1822), nom. cons. - water-shield family