nl, agglomeratie leiden en bollenstreek, agrostis stolonifera, trifolium repens, ranunculus repens, alopecurus geniculatus, poa trivialis, glyceria fluitans, lolium perenne, ranunculus sceleratus, poa annua, stellaria media, eleocharis palustris, elymus repens, holcus lanatus, persicaria amphibia, bolboschoenus maritimus, glyceria maxima, elodea nuttallii, phalaris arundinacea, lemna trisulca, persicaria hydropiper, juncus articulatus, cerastium holosteoides, spirodela polyrhiza, stuckenia pectinata, potamogeton pusillus, polygonum aviculare, ranunculus acris, sparganium erectum, myosotis scorpioides, ceratophyllum demersum, cirsium arvense, butomus umbellatus, rumex acetosa, argentina anserina, cardamine pratensis, plantago major, phleum pratense, ranunculus circinatus, alopecurus pratensis, poa pratensis, oenanthe fistulosa, bellis perennis, dactylis glomerata, phragmites australis, zannichellia palustris, equisetum fluviatile, lemna gibba, triglochin palustris, carex hirta, capsella bursa-pastoris