Phylum Magnoliophyta Cronquist, Takht. & Zimmerm. ex Reveal (1996) see Infraphylum Angiospermae auct.
   Class Magnoliopsida Brongn. (1843)
     Subclass Caryophyllidae Takht. (1967) see Order Caryophyllales Juss. ex Bercht. & J.Presl (1820)
       Superorder Polygonanae Takht. ex Reveal (1992) see Order Caryophyllales Juss. ex Bercht. & J.Presl (1820)
         Order Polygonales Dumort. (1829) see Order Caryophyllales Juss. ex Bercht. & J.Presl (1820)
           Family Polygonaceae Juss. (1789), nom. cons. - buckwheat family
             Subfamily Eriogonoideae Arn.
               Tribe Eriogoneae Dumort. (1829)
                 1 Genus Eriogonum Michx. (1803)
                 2 Genus Oxytheca Nutt. (1848)
                 3 Genus Stenogonum Nutt. (1848)
                 4 Genus Nemacaulis Nutt. (1848)
                 5 Genus Chorizanthe R.Br. ex Bentham (1836)
                 6 Genus Lastarriaea Rémy, in C. Gay (1851)