Phylum Magnoliophyta Cronquist, Takht. & Zimmerm. ex Reveal (1996) see Infraphylum Angiospermae auct.
   Class Magnoliopsida Brongn. (1843)
     Subclass Lamiidae Takht. ex Reveal (1993) see [unranked] lamiids
       Superorder Lamianae Takht. (1967) see Order Lamiales Bromhead (1838)
         Order Scrophulariales Lindl. (1833) see Order Lamiales Bromhead (1838)
           Family Acanthaceae Juss. (1789), nom. cons. - Acanthus family
             Subfamily Nelsonioideae Pfeiff.
               1 Genus Staurogyne Wall. (1831)
               2 Genus Nelsonia R.Br. (1810)
               3 Genus Elytraria Michx. (1803), nom. cons.