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