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