Floating aquatic plant, Eichhornia crassipes of tropical America, having showy bluish-purple flowers and swollen leafstalks: family Pontederiaceae. It forms dense masses in rivers, ponds, etc., and is a serious pest in the southern U.S., Java, Australia, New Zealand, and parts of Africa.
(Source: CED)
a tropical floating aquatic plant having spikes of large blue flowers; troublesome in clogging waterways especially in southern United States
