Water Hyacinth

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pickerelweed, common name for the Pontederiaceae, a family of chiefly tropical perennial aquatic herbs found in freshwater. The pickerelweeds (genus Pontederia) range north into temperate regions, including most of the E United States and Canada. The water hyacinth (Eichhornia crassipes), a native of tropical America, has spread widely and is so prolific that it has clogged many waterways in the S United States and in other areas, including Java, Australia, and the Great Lakes region of E Africa. It is sometimes cultivated in tanks and ponds for its ornamental foliage and blue-violet flowers, and is used in some areas as a raw material for producing biogas for cooking. The pickerelweed family is classified in the division Magnoliophyta, class Liliopsida, order Liliales.
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The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Water Hyacinth


(Eichornia crassipes; formerly E. speciosa), a perennial herbaceous aquatic plant of the family Pontederiaceae. The stem is short, with rosettes of oval leaves. The leaf petioles are filled with air and inflated like bubbles to ensure that the plant floats on the water surface. The rhizomes are long, so that if the water dries out, the plant takes root in the muddy bottom. The flowers are in a spicate inflorescence with a funnelform lilac perianth of six lobes and six stamens. The fruit is a capsule.

The water hyacinth is native to tropical and subtropical regions of North and South America. It has spread to the fresh waters of all tropical lands. A pernicious aquatic weed, it forms dense thickets in rivers, obstructing navigation and contaminating drainage and irrigation systems. The water hyacinth is controlled by mechanical and chemical methods; in some countries it is used as fertilizer or livestock feed.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
References in periodicals archive ?
(2014) found out that the effluent from water supply channels with tambaqui farming treated with Eichhornia crassipes (Mart.) Solms showed lower pH values when compared to the treatments without plants.
Harley, "The role of biological control in the management of water hyacinth Eichhornia crassipes," Biocontrol News and Information, vol.
Ogunbayio, "Achieving environmental sustainability in wastewater treatment by phytoremediation with water hyacinth (Eichhornia crassipes)," Journal of Sustainable Development, vol.
Uptake of metals by Eichhornia crassipes was dependent on time and concentration (Fig 1, 2 and 3).
El uso de compost de jacinto de agua (Eichhornia crassipes) se destaca en la agricultura por su aporte de nutrientes (Mashavira et al., 2015) y representa una alternativa economica al tratamiento de la biomasa de esta planta acuatica invasora, cuyas poblaciones se requiere controlar periodicamente, pues de lo contrario cubre rapidamente los estanques y reservorios de agua, agotando el oxigeno y obstaculizando su circulacion normal, asi como impidiendo que llegue el sol a otras plantas acuaticas (Jafari, 2010).
A physiological age-grading system for Neochetina eichhorniae (Warner) (Coleoptera: Curculionidae), a biological control agent of waterhyacinth, Eichhornia crassipes (Mart.) Solms.
Hill, "Water hyacinth population dynamics," in Biological and Integrated Control of Water Hyacinth, Eichhornia crassipes, M.
4 Eichhornia crassipes (Mart.) Solms 5 Aeschynomene indica Linn.
To understand the mechanism of high efficiency nutrient acquisition and utilization, the genes involved in low-sulfur tolerance were isolated from a water hyacinth, Eichhornia crassipes, by a gene mining method.