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