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