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