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