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