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