nl, oost-zuid-holland, agrostis stolonifera, elodea nuttallii, ranunculus repens, spirodela polyrhiza, glyceria maxima, glyceria fluitans, poa trivialis, lolium perenne, ceratophyllum demersum, lemna trisulca, sparganium erectum, trifolium repens, persicaria amphibia, phalaris arundinacea, lemna gibba, holcus lanatus, elymus repens, stellaria media, dactylis glomerata, alopecurus geniculatus, ranunculus sceleratus, phragmites australis, poa annua, butomus umbellatus, ranunculus acris, persicaria hydropiper, ranunculus circinatus, cirsium arvense, myosotis scorpioides, alopecurus pratensis, sagittaria sagittifolia, glechoma hederacea, rorippa amphibia, phleum pratense, rumex acetosa, hydrocharis morsus-ranae, cerastium holosteoides, urtica dioica, potamogeton pusillus, eleocharis palustris, stuckenia pectinata, polygonum aviculare, nuphar lutea, equisetum fluviatile, oenanthe fistulosa, berula erecta, wolffia arrhiza, cardamine pratensis, juncus articulatus, rumex obtusifolius