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