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