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