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