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