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