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