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