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