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