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