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