Hydrilla Verticillata Plants

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Hydrilla Verticillata Plants

Hydrilla Verticillata Plants
Item #: HV1



Hydrilla (Esthwaite Waterweed or Hydrilla) is a genus of aquatic plant, usually treated as containing just one species, Hydrilla verticillata, though some botanists divide it into several species. Synonyms include H. asiatica, H. japonica, H. lithuanica, and H. ovalifolica. It is native to the cool and warm waters of the Old World in Asia, Europe, Africa and Australia, with a sparse, scattered distribution; in Europe, it is reported from Ireland, Great Britain, Germany, and the Baltic States, and in Australia from Northern Territory, Queensland, and New South Wales.[1][2][3] The stems grow up to 12 m long. The leaves are arranged in whorls of two to eight around the stem, each leaf 520 mm long and 0.72 mm broad, with serrations or small spines along the leaf margins; the leaf midrib is often reddish when fresh. It is monoecious (sometimes dioecious), with male and female flowers produced separately on a single plant; the flowers are small, with three sepals and three petals, the petals 35 mm long, transparent with red streaks. It reproduces primarily vegetatively by fragmentation and by rhizomes and turions (overwintering), and flowers are rarely seen.[2][4][5][6] Hydrilla has a high resistance to salinity (>1-100000 ppt) compared to many other freshwater associated aquatic plants. The name Esthwaite Waterweed comes from its occurrence in Esthwaite Water in northwestern England, the only English site where it is native, but now presumed extinct, having not been seen since 1941.[7] Hydrilla closely resembles some other related aquatic plants, including Egeria and Elodea.

Sale Price : $3.50
Was : $4.99
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Hydrilla Verticillata Plants



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