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