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