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