Water weeds Information & Care

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Plant Type Aquatic plants
Plant Family Hydrocharitaceae
Common Name Water weeds
Scientific Name Elodea
Description

Elodea is a genera of aquatic plants often called water weeds. Elodea ia native to North America and it is also widely used as aquarium vegetation. Introduction of some species Elodea, into waterways in (parts of Europe, the Australia, Africa, Asia, and New Zealand) has created a significant problem, and it is now considered a noxious weed in these areas.

Elodea canadensis, sometimes called American or Canadican waterweed or Anacharis (a former scientific name) is widely known as the generic water weed . The use of these names causes it to be confused with similar-looking nonnative plants like Brazilian elodea (Egeria Densa) or hydrilla (Hydrilla verticillata). American waterweed is an attractive aquarium plant, and is a good substitute for Brazilian elodea since it is native to Washington's lakes, ponds, and rivers.

American waterweed is usually fairly easy to distinguish from its more notorious relatives, like Brazilian elodea and hydrilla . All of them have leaves in whorls around the stem. However, American waterweed has three leaves per whorl, whereas hydrilla and Brazilian elodea almost always have more than three leaves per whorl. Brazilian elodea is also a much larger, bushy plant with longer leaves. American waterweed also looks very much like another native elodea, Elodea nuttallii, which generally has three narrower leaves per whorl.

American waterweed lives entirely underwater with the exception of small white flowers which bloom at the surface and are attached to the plant by delicate stalks. It produces winter buds from the stem tips which overwinter on the lake bottom. It also often overwinters as an evergreen plant in mild climates. In the fall leafy stalks will detach from the parent plant, float away, root, and start new plants. This is American waterweed's most important method of spreading, with seed production playing a relatively minor role.

Silty sediments and water rich in nutrients favor the growth of American waterweed in nutrient-rich lakes. However, the plant will grow in a wide range of conditions, from very shallow to deep water, and in many sediment types. It can even continue to grow unrooted, as floating fragments. It is found throughout temperate North America, and is one of the most common aquatic plants in Washington.

American waterweed is an important part of lake ecosystems. It provides good habitat for many aquatic invertebrates and cover for young fish and amphibians. Waterfowl, especially ducks, as well as beaver and muskrat eat this plant. Also, it is of economic importance as an attractive and easy to keep aquarium plant.

Cells of elodea leaves are known for their vivid exhibition of cyclosis, or cytoplasmic streaming.

From wikipedia.org

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