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