nl, oost-zuid-holland, elodea nuttallii, spirodela polyrhiza, glyceria maxima, agrostis stolonifera, sparganium erectum, glyceria fluitans, lemna trisulca, stuckenia pectinata, sagittaria sagittifolia, persicaria amphibia, ceratophyllum demersum, potamogeton pusillus, lemna minor, phragmites australis, lemna gibba, phalaris arundinacea, ranunculus circinatus, alisma plantago-aquatica, butomus umbellatus, ranunculus repens, equisetum fluviatile, hydrocharis morsus-ranae, myosotis scorpioides, poa trivialis, elodea canadensis, ranunculus sceleratus, nuphar lutea, rorippa amphibia, eleocharis palustris, potamogeton natans, potamogeton trichoides, persicaria hydropiper, myriophyllum spicatum, alopecurus geniculatus, elymus repens, cirsium arvense, lolium perenne, trifolium repens, potamogeton friesii, potamogeton crispus, poa annua, urtica dioica, juncus articulatus, nymphoides peltata, equisetum palustre, holcus lanatus, bolboschoenus maritimus, epilobium hirsutum, potamogeton lucens, sparganium emersum