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, rumex acetosa, alopecurus pratensis, phleum pratense, phalaris arundinacea, persicaria amphibia, ranunculus sceleratus, cerastium holosteoides, persicaria hydropiper, glyceria maxima, dactylis glomerata, eleocharis palustris, cardamine pratensis, myosotis scorpioides, cirsium arvense, juncus articulatus, poa pratensis, polygonum aviculare, oenanthe fistulosa, plantago major, bellis perennis, capsella bursa-pastoris, stellaria alsine, argentina anserina, glechoma hederacea, sparganium erectum, elodea nuttallii, bromus hordeaceus, rumex obtusifolius, lemna trisulca, spirodela polyrhiza, carex hirta, rorippa amphibia, galium palustre, bolboschoenus maritimus, rumex crispus, equisetum fluviatile, triglochin palustris, ceratophyllum demersum