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