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