text: butomus umbellatus, veronica anagallis-aquatica, potamogeton nodosus, sparganium erectum, trapa natans, cirsium arvense, lemna minor, lycopus europaeus, oenanthe aquatica, persicaria hydropiper, phalaris arundinacea, salvinia natans, scutellaria galericulata, spirodela polyrhiza, stachys palustris, xanthium albinum