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