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 Monocotyledones see Class Liliopsida Batsch (1802)
         Order Graminales
           Family Gramineae Juss. (1789), nom. cons. see Family Poaceae Barnhart (1895), nom. cons.
             Genus Elymus L. (1753)
               Elymus repens (L.) Gould (1947) - quackgrass
                 1 "Elymus repens subsp. arenosus" (Petif) Melderis
                 2 Elymus repens subsp. repens (L.) Gould (1947)