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