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