What is horsetail(Equisetum arvense (L)) and it's super function?

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Horsetail origin and class.

Horsetail Extract.CAS.NO.071011-23-9.Silica,Vegetal Silica 7%Equisetum arvense extract,Equiseti herba,CAS.NO:1343-98-2;7631-86-9.Horsetail Grass Extract,Equisetum hyemale;Shavegrass.Equisetum arvense, extract;Horsetail equisetium arvense extract photo picture image As the whole herb of Equisetum hyemale L., a perennial flowerless plant, of the Equisetaceae family. There are 30 species of rushlike, conspicuously jointed, perennial herbs. Equisetum is the only living genus of the order Equisetales and the class Sphenopsida.
 Horsetails grow in moist, rich soils in all parts of the world except Australasia. Some species produce two kinds of shoots: those with conelike clusters (strobili) of spore capsules and those lacking such structures. Some are evergreen; others send up new shoots annually from underground rootstalks. Their hollow, jointed, ridged stems contain silicate and other minerals. The leaves are reduced to sheaths that clasp and encircle the shoots.
 A widespread species along stream banks and in meadows in North America and Eurasia is the common horsetail (E. arvense), about 30 cm tall. The central cavity of each stem is about a quarter of its outside diameter. Fairly thick, solid branches arise from below the sheaths, circling the shoots like spokes on a wheel. Stems that bear terminal spore cones are often flesh-coloured.
 Wood horsetail (E. sylvaticum) grows in moist, cool woods and has many delicate branches that circle the shoots.
 Variegated horsetail (E. variegatum) is evergreen and has black markings on the sheaths.
 Dutch rushes (E. hyemale), common in moist woods and on riverbanks, reach well over a metre in height. The evergreen shoots often are used for scouring.
 In China, the plant E. hyemale is produced in the provinces in the Northeast and North of China, Inner Mongolia and the Yangtze River Valley, picked and reaped in summer with impurities and fibrous roots removed, dried in the sun or shade, cut into sections and included in the preparation for use.
 The plant is also called Scouring Rush.

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citations1.What is horsetail(Equisetum arvense (L)) and it's super function?

last edit date:4th,May.2009.