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 Myrtales Juss. ex Bercht. & J.Presl (1820)
           Family Onagraceae Juss. (1789), nom. cons. - evening primrose family
             Genus Oenothera L. (1753)
               Oenothera parviflora L. - northern evening-primrose
                 1 Oenothera parviflora var. parviflora L.
                 2 Oenothera parviflora var. ammophila (Focke) Hegi