nl, oost-zuid-holland, ranunculus repens, agrostis stolonifera, poa trivialis, lolium perenne, holcus lanatus, glyceria fluitans, phalaris arundinacea, glyceria maxima, trifolium repens, stellaria media, spirodela polyrhiza, rumex acetosa, elymus repens, ranunculus acris, persicaria amphibia, lemna trisulca, sparganium erectum, persicaria hydropiper, alopecurus pratensis, poa annua, glechoma hederacea, alopecurus geniculatus, dactylis glomerata, ceratophyllum demersum, galium palustre, rorippa amphibia, myosotis scorpioides, cardamine pratensis, wolffia arrhiza, cerastium holosteoides, elodea nuttallii, juncus effusus, lemna gibba, polygonum aviculare, cirsium arvense, urtica dioica, ranunculus sceleratus, phleum pratense, rumex obtusifolius, oenanthe fistulosa, juncus articulatus, hydrocharis morsus-ranae, ranunculus flammula, plantago major, stellaria alsine, bellis perennis, capsella bursa-pastoris, phragmites australis, rumex hydrolapathum, poa pratensis