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