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