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