Phylum Magnoliophyta Cronquist, Takht. & Zimmerm. ex Reveal (1996) see Infraphylum Angiospermae auct.
   Class Magnoliopsida Brongn. (1843)
     Subclass Dilleniidae Takht. ex Reveal & Tahkt. (1993) see Order Dilleniales DC. ex Bercht. & J.Presl (1820)
       Superorder Euphorbianae Takht. ex Reveal (1992) see Order Malpighiales Juss. ex Bercht. & J.Presl (1820)
         Order Euphorbiales Lindl. (1833) see Order Malpighiales Juss. ex Bercht. & J.Presl (1820)
           Family Euphorbiaceae Juss. (1789), nom. cons. - spurge family
             Subfamily Oldfieldioideae see Family Picrodendraceae Small (1917), nom. cons.
               Tribe Picrodendreae (J.K. Small, 1917) Fawc. & Rendle (1920)
                 Genus Picrodendron Grisebach (1860), nom. cons.