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