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