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