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