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