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