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 Helobiae
           Family Potamogetonaceae Bercht. & J.Presl (1823), nom. cons. - pondweed family
             Genus Zannichellia L. (1753)
               Zannichellia palustris L. - horned pondweed
                 Zannichellia palustris subsp. polycarpa (Nolte) K.Richt.