Water Hyacinth Plant. Water hyacinth, any aquatic plant of the genus eichhornia of the pickerelweed family (pontederiaceae), consisting of about five species, native primarily to tropical america. Water hyacinth is a very aggressive invader and can form thick mats.
Potentially, water hyacinth could be very important in sewage and waste water treatment. Water hyacinth is a very aggressive invader and can form thick mats. Water hyacinths have the characteristic thick green leaves of other herbaceous floating plants like frogbit , which can reach 15 cm (6 in) in length.