Domain Eucaryota
   Subdomain Chlorota Doweld (2001)
     Kingdom Chlorobiota C.Jeffrey ex Doweld (2001) - plants see Subkingdom Viridiplantae Caval.-Sm. (1981)
       Subkingdom Pteridobiotina Britton & A. Br. (1896)
         Superphylum Cycadophytanae Doweld (2001)
           Phylum Magnoliophyta Cronquist, Takht. & Zimmerm. ex Reveal (1996) see Infraphylum Angiospermae auct.
             Subphylum Magnoliophytina Reveal (1996)
               Class Magnoliopsida Brongn. (1843)
                 Subclass Nymphaeidae J.W. Walker ex Takht. (1997) [monotypic] see Order Nymphaeales Salisb. ex Bercht. & J.Presl (1820)
                   Superorder Nymphaeanae Thorne ex Reveal (1992)
                     Order Barclayales Doweld (2001) [monotypic] see Order Nymphaeales Salisb. ex Bercht. & J.Presl (1820)
                       Family Barclayaceae H.L. Li (1955) see Family Nymphaeaceae Salisb. (1805), nom. cons.
                         Genus Barclaya Wall. (1827), nom. cons.