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