nl, agglomeratie leiden en bollenstreek, agrostis stolonifera, ranunculus repens, trifolium repens, lolium perenne, poa trivialis, holcus lanatus, alopecurus geniculatus, glyceria fluitans, rumex acetosa, ranunculus acris, cardamine pratensis, eleocharis palustris, juncus articulatus, cerastium holosteoides, oenanthe fistulosa, elymus repens, persicaria amphibia, stellaria media, poa annua, bellis perennis, triglochin palustris, cirsium arvense, phalaris arundinacea, ranunculus sceleratus, galium palustre, plantago major, juncus effusus, anthoxanthum odoratum, bolboschoenus maritimus, alopecurus pratensis, argentina anserina, phleum pratense, myosotis scorpioides, carex hirta, poa pratensis, bromus hordeaceus, dactylis glomerata, lolium pratense, glyceria maxima, rumex crispus, persicaria hydropiper, cynosurus cristatus, festuca rubra, ranunculus flammula, polygonum aviculare, rumex conglomeratus, phragmites australis, trifolium pratense, sagina procumbens, stellaria alsine