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 Myrtanae Takht. (1967) see Order Myrtales Juss. ex Bercht. & J.Presl (1820) Order Myrtales Juss. ex Bercht. & J.Presl (1820) Suborder Onagrineae see Order Myrtales Juss. ex Bercht. & J.Presl (1820) Family Onagraceae Juss. (1789), nom. cons. - evening primrose family Tribe Onagreae Dumort. (1827) Genus Xylonagra J.D.Sm. & J.N. Rose (1913)