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