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