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