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