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