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 Haloragaceae R.Br. (1814), nom. cons.
             Genus Myriophyllum L. (1753)
               1 Myriophyllum verticillatum L. - whorled water-milfoil
               2 Myriophyllum alterniflorum DC. (1815) - alternateflower watermilfoil
               3 Myriophyllum spicatum L. - Eurasian watermilfoil