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