nl, oost-zuid-holland, poa trivialis, ranunculus repens, holcus lanatus, agrostis stolonifera, lolium perenne, phalaris arundinacea, glyceria fluitans, glyceria maxima, trifolium repens, rumex acetosa, spirodela polyrhiza, elymus repens, persicaria amphibia, stellaria media, ranunculus acris, lemna trisulca, glechoma hederacea, sparganium erectum, alopecurus pratensis, dactylis glomerata, ceratophyllum demersum, juncus effusus, galium palustre, alopecurus geniculatus, poa annua, urtica dioica, elodea nuttallii, cardamine pratensis, persicaria hydropiper, rorippa amphibia, cerastium holosteoides, myosotis scorpioides, phragmites australis, lemna gibba, wolffia arrhiza, cirsium arvense, rumex obtusifolius, iris pseudacorus, hydrocharis morsus-ranae, polygonum aviculare, phleum pratense, ranunculus sceleratus, oenanthe fistulosa, juncus articulatus, rumex hydrolapathum, nuphar lutea, ranunculus flammula, plantago major, acorus calamus, festuca rubra