A tropical floating aquatic plant having spikes of large blue flowers; troublesome in clogging waterways especially in southern United States.

synonyms: Eichhornia crassipes, Eichhornia spesiosa, water hyacinth.

Dutch: waterhyacint
Polish: hiacynt wodny, eichornia gruboogonkowa, pontederia gruboogonkowa, hiacynt pływający