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