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Equisetum scirpoides : ウィキペディア英語版 | Equisetum scirpoides
''Equisetum scirpoides'' (dwarf scouring rush, dwarf horsetail) Michx., Fl. Bor.-Amer. 2: 281 (1803). 2 n = 216.'' ''The smallest of the currently occurring representatives of the genus ''Equisetum'' (horsetail). It occurs mainly in the area of the Arctic Circle in Alaska for the Indians and Greenland, Idaho, Montana, South Dakota, Minnesota, Iowa, Illinois, New York and New England. Creates a compact and dense clumps. Reaches a maximum height of about 30 cm. The assimilation and generative shoots are identical and grow together. The leaves reduced to a black sheath around the stem. The stems are green, unbranched, thick and about 1 mm with six ribs. The generative shoots with small cones dying after sowing the spores. The nodes occur at approximately 1 – 3 cm. The leaves are very small to about 1 mm, and arranged in around nodes. The corms are thin, yellow and brown. The roots very fine, black and densely surpassing the ground. Species grows best in the mud at the depth zone from 0 to 3 cm. Specimens reproduce primarily by vegetative division. ''Equisetum scirpoides'' is hardy and semi-evergreen. This species is quite a popular decorative plant seen in garden ponds, ornamental gardens and assumptions in nearly the whole world. ''E. scirpoides'' was discovered and described by French botanist André Michaux. Detailed studies were conducted by the American botanist Oliver Atkins Farwell.〔() The International Plant Names Index (IPNI)〕 ==Name== ''Equisetum'', from the Latin, equus, "horse", and seta, "bristle, animal hair". ''Scirpoides'', from the Latin, scirpus, "rush, bulrush". Scouring Rush, a reference to its early use for cleaning pots, made possible by its high silica content. Other common names include dwarf horsetail, sedge horsetail, prele faux-scirpe (Qué), tradfräken (Swe), dvergsnelle (Nor), trad-padderok (Dan), hentokorte (Fin), dwergholpijp (NL), himedokusa (Jpn), skrzyp arktyczny (PL).
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