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