gnaphalium uliginosum, oenanthe aquatica, persicaria maculosa, alopecurus aequalis, cerastium holosteoides, glyceria fluitans, tripleurospermum inodorum, bidens tripartita, echinochloa crus-galli, persicaria lapathifolia, phalaris arundinacea, polygonum aviculare, vicia hirsuta