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