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 Oldfieldia Bentham & Hook. (1850)