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