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