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