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