Phylum Magnoliophyta Cronquist, Takht. & Zimmerm. ex Reveal (1996) see Infraphylum Angiospermae auct.
   Class Magnoliopsida Brongn. (1843)
     Subclass Cornidae Frohne & U. Jensen ex Reveal (1994) see Subclass Asteridae Takht. (1967)
       Superorder Cornanae Thorne ex Reveal (1996) see Order Cornales Link (1829)
         Order Hydrangeales Nakai (1943) see Order Cornales Link (1829)
           Family Hydrangeaceae Dumort. (1829), nom. cons. - Hydrangea family
             Subfamily Philadelphoideae see Tribe Philadelpheae DC. ex Duby (1828)
               Tribe Philadelpheae DC. ex Duby (1828)
                 1 Genus Carpenteria J. Torrey (1851)
                 2 Genus Fendlerella Heller (1898)
                 3 Genus Fendlera Engelmann & A.Gray (1852)
                 4 Genus Jamesia J. Torrey & A.Gray (1840), nom. cons.
                 5 Genus Philadelphus L. (1753)
                 6 Genus Whipplea Torrey (1857)