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