water hyacinth

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Related to Eichhornia: Ceratophyllum

water hyacinth:

see pickerelweedpickerelweed,
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.
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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.

References in periodicals archive ?
aquaticum show the importance to consider life history traits throughout the native range and the effect of environmental factors as useful information for the possible use of this grasshopper as a biological control agent of Eichhornia crassipes in non-native areas.
Las especies predominantes son Typha domingensis y Enhydra sessilifolia, ambas especies emergentes y en los alrededores encontramos Eichhornia crassipes una flotante libre.
Feeding impact and bionomics of the grasshopper Cornops aquaticum on the water hyacinth Eichhornia crassipes in Central Amazonian floodplains.
Micronuclei were increased in roots of Eichhornia crassipes following exposure to methyl mercury chloride (Panda et al.
Computer simulations (Heuch 1980) and empirical studies of small populations of tristylous Eichhornia paniculata (Husband and Barrett 1992) and Lythrum salicaria (Eckert and Barrett 1992) indicate that the stochastic loss of style morphs from populations usually involves the short-styled morph because of a genetic constraint associated with the inheritance of tristyly.
Kalopolynema ema (Hymenoptera: Mymaridae) adults that emerged from eggs of Megamelus scutellaris (Hemiptera: Delphacidae), a biological control agent of waterhyacinth, Eichhornia crassipes.
In other aquatic plant, Eichhornia crassipes, there was higher total P in plant tissues and greater relative growth rates upon treatments with increase P concentration in the water (Kobayashi et al.
The use of macrophytes such as Pistia and Eichhornia for phytoremediaion of wastewater polluted by organic and inorganic pollutants was investigated by Elumalai et al.