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