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