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