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