nl, oost-zuid-holland, lolium perenne, ranunculus repens, poa trivialis, trifolium repens, agrostis stolonifera, poa annua, holcus lanatus, elymus repens, stellaria media, dactylis glomerata, rumex acetosa, polygonum aviculare, cerastium holosteoides, ranunculus acris, phalaris arundinacea, alopecurus geniculatus, glyceria fluitans, cirsium arvense, persicaria amphibia, phleum pratense, alopecurus pratensis, capsella bursa-pastoris, rumex obtusifolius, plantago major, glechoma hederacea, urtica dioica, poa pratensis, cardamine pratensis, festuca rubra, glyceria maxima, bellis perennis, bromus hordeaceus, plantago lanceolata, ceratophyllum demersum, persicaria hydropiper, agrostis capillaris, sparganium erectum, lemna gibba, rumex crispus, lemna trisulca, spirodela polyrhiza, phragmites australis, argentina anserina, anthoxanthum odoratum, ranunculus sceleratus, juncus effusus, sagina procumbens, matricaria discoidea, myosotis scorpioides, trifolium pratense