Flora van Nederland Haeckel (1866) - plants
   Division Spermatophyta Goebel (1882) see Phylum Spermatophyta Goebel (1882)
     Subdivision Angiospermae J. Lindley (1830) see Infraphylum Angiospermae auct.
       Class Dicotyledones see Class Magnoliopsida Brongn. (1843)
         Order Rhoeadales
           Family Cruciferae Juss. (1789), nom. cons. see Family Brassicaceae Burnett (1835), nom. cons.
             Genus Erysimum L. (1753) - treacle mustards
               Erysimum cheiranthoides L. - treacle wallflower