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|synonyms_ref = 〔(【引用サイトリンク】title=The Plant List: A Working List of All Plant Species )〕 |}} ''Chrysopogon zizanioides'', commonly known as vetiver (derived from the Tamil: வெட்டிவேர் ''věţţivēr'') is a perennial bunchgrass of the Poaceae family, native to India. In western and northern India, it is popularly known as ''khus''. Vetiver is most closely related to ''Sorghum'' but shares many morphological characteristics with other fragrant grasses, such as lemongrass (''Cymbopogon citratus''), citronella (''Cymbopogon nardus'', ''C. winterianus''), and palmarosa (''Cymbopogon martinii''). ==Description== Vetiver can grow up to 1.5 metres high and form clumps as wide. The stems are tall and the leaves are long, thin, and rather rigid. The flowers are brownish-purple. Unlike most grasses, which form horizontally spreading, mat-like root systems, vetiver's roots grow downward, 2–4 m in depth. Source: The vetiver bunch grass has a gregarious habit and grows in tufts. Shoots growing from the underground crown make the plant frost and wildfire resistant, and allow it to survive heavy grazing pressure. The leaves can become up to 120–150 cm long and 0.8 cm wide. The panicles are 15–30 centimeters long and have whorled, 2.5–5.0 centimeters long branches.〔 The spikelets are in pairs, and there are three stamens. The plant stems are erect and stiff. They can persist deep water flow. Under clear water, the plant can survive up to two months. The root system of vetiver is finely structured and very strong. It can grow 3–4 m deep within the first year. Vetiver has no stolons nor rhizomes. Because of all these characteristics, the vetiver plant is highly drought-tolerant and can help to protect soil against sheet erosion. In case of sediment deposition, new roots can grow out of buried nodes. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Chrysopogon zizanioides」の詳細全文を読む スポンサード リンク
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