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