nl, oost-zuid-holland, lolium perenne, agrostis stolonifera, ranunculus repens, poa trivialis, trifolium repens, dactylis glomerata, elymus repens, holcus lanatus, poa annua, stellaria media, persicaria amphibia, ranunculus acris, cirsium arvense, polygonum aviculare, phalaris arundinacea, urtica dioica, cerastium holosteoides, glyceria fluitans, rumex acetosa, glechoma hederacea, glyceria maxima, plantago major, alopecurus pratensis, phleum pratense, bellis perennis, poa pratensis, capsella bursa-pastoris, argentina anserina, alopecurus geniculatus, plantago lanceolata, rumex obtusifolius, festuca rubra, phragmites australis, spirodela polyrhiza, trifolium pratense, elodea nuttallii, achillea millefolium, ranunculus sceleratus, sparganium erectum, arrhenatherum elatius, anthriscus sylvestris, rumex crispus, heracleum sphondylium, ceratophyllum demersum, lemna gibba, bromus hordeaceus, cardamine pratensis, lemna trisulca, carex hirta, persicaria hydropiper