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