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