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