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