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