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