Phylum Magnoliophyta Cronquist, Takht. & Zimmerm. ex Reveal (1996) see Infraphylum Angiospermae auct.
   Class Magnoliopsida Brongn. (1843)
     Subclass Rosidae Takht. (1967) see Superorder Rosanae Takht. (1967)
       Superorder Rhamnanae Takht. ex Reveal (1992) see Order Rosales Bercht. & J.Presl (1820)
         Order Rhamnales Dumort. (1829) see Order Rosales Bercht. & J.Presl (1820)
           Family Rhamnaceae Juss. (1789), nom. cons. - buckthorn family
             Tribe Gouanieae Rchb. (1837)
               1 Genus Gouania Jacq. (1763)
               2 Genus Helinus E.H.F. Meyer ex Endl. (1840), nom. cons.
               3 Genus Crumenaria Mart. (1826)