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