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