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