a South American aquatic plant (Eichhornia crassipes) of the pickerelweed family, with swollen petioles that float on water and spikes of showy lavender flowers: a pest that blocks water traffic in the S U.S., esp. Florida
"water hyacinth." YourDictionary, n.d. Web. 05 December 2018. <https://www.yourdictionary.com/water-hyacinth>.
water hyacinth. (n.d.). Retrieved December 05th, 2018, from https://www.yourdictionary.com/water-hyacinth
Any of several tropical aquatic plants of the genus Eichhornia, especially the widespread species E. crassipes, originally of South America, which forms dense floating masses in rivers and lakes and has large bluish-purple flowers and leafstalks with greatly inflated bases.