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