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