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 Polygonales Dumort. (1829) see Order Caryophyllales Juss. ex Bercht. & J.Presl (1820)
           Family Polygonaceae Juss. (1789), nom. cons. - buckwheat family
             Genus Polygonum L. (1753) - knot grass
               01 Polygonum convolvulus L. - black bindweed see Fallopia convolvulus (L.) A. Löve
               02 Polygonum dumetorum L. see Fallopia dumetorum (L.) Holub (1971)
               03 Polygonum cuspidatum Siebold & Zucc. - fleeceflower see Reynoutria japonica Houtt.
               04 Polygonum ×vivax A. Schmitz & Schrank
               05 Polygonum sachalinense F.Schmidt (1859) - giant knotweed see Reynoutria sachalinensis (F.Schmidt Petrop.) Nakai
               06 Polygonum polystachyum Wall. ex Meissn. - cultivated knotweed
               07 Polygonum bistorta L. - meadow bistort
               08 Polygonum amphibium L. - water knotweed
               09 Polygonum oxyspermum C.A.Mey. & Bunge (1824) - sharpfruit knotweed
               10 Polygonum aviculare L. - prostrate knotweed
               11 Polygonum maritimum L.
               12 Polygonum lapathifolium L. - curltop ladysthumb
               13 Polygonum persicaria L. - ladysthumb
               14 Polygonum hydropiper L. - annual smartweed
               15 Polygonum mite Schrank
               16 Polygonum minus Huds.