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