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 Nymphaeales Salisb. ex Bercht. & J.Presl (1820)
           Family Barclayaceae H.L. Li (1955) see Family Nymphaeaceae Salisb. (1805), nom. cons.
             1 Genus Barclaya Wall. (1827), nom. cons.
             1.0 Genus Hydrostemma Wall. see Genus Barclaya Wall. (1827), nom. cons.