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