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