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