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 Hamamelididae Takht. (1967)
                   A Superorder Trochodendranae Takht. ex Reveal (1996) [monotypic]
                   B Superorder Proteanae Takht. (1967)
                   C Superorder Nelumbonanae Takht. ex Reveal (1992) [monotypic] see Order Proteales Juss. ex Bercht. & J.Presl (1820)
                   D Superorder Sabianae Doweld (2001) [monotypic] see Order Proteales Juss. ex Bercht. & J.Presl (1820)
                   E Superorder Hamamelidanae Takht. (1967) see Order Saxifragales Bercht. & J.Presl (1820)
                   F Superorder Daphniphyllanae Takht. (1997) [monotypic] see Order Saxifragales Bercht. & J.Presl (1820)
                   G Superorder Paeonianae Doweld (2001) [monotypic] see Order Saxifragales Bercht. & J.Presl (1820)
                   H Superorder Saxifraganae Reveal (1994)
                   I Superorder Dillenianae Takht. ex Doweld (2001)
                   J Superorder Vitanae Takht. ex Reveal (1992) [monotypic] see Order Vitales Juss. ex Bercht. & J.Presl (1820)
                   K Superorder Buxanae Takht. ex Reveal & Doweld (1999) [monotypic]
                   L Superorder Myrothamnanae Takht. (1997)
                   M Superorder Santalanae Thorne ex Reveal (1992)