Chrysopogon zizanioides
Chrysopogon zizanioides
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Chrysopogon zizanioides

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Chrysopogon zizanioides

Chrysopogon zizanioides, commonly known as vetiver and khus, is a perennial bunchgrass of the family Poaceae.

Vetiver is most closely related to sorghum while sharing many morphological characteristics with other fragrant grasses, such as lemongrass (Cymbopogon citratus), citronella (Cymbopogon nardus, C. winterianus), and palmarosa (Cymbopogon martinii).

Vetiver is derived from the Tamil வெட்டிவேர் (veṭṭivēr) meaning 'root that is dug up', via French vétyver. In Northern India it is also called khus ('grass', not to be confused with khus khus, which refers to poppy seed).[citation needed]

During the reign of Harshavardhan, Kannauj became the biggest centre for aromatic trade and for the first time, a vetiver tax was introduced.

Starting in 1990, the World Bank promoted use of vetiver grass by farmers for soil and water management in countries like India, Nepal, Thailand, and Nigeria.

Vetiver grows to 150 centimetres (5 ft) high and forms clumps as wide,[citation needed] and under favorable conditions, the erect culms can reach 3 m (9.8 ft) in height. 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 (7–13 ft) in depth.

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 300 cm (10 ft) long and 8 mm (38 in) wide. The panicles are 15–30 cm (6–12 in) long and have whorled, 25–50 mm (1–2 in) long branches. The spikelets are in pairs, and there are three stamens.

The plant stems are erect and stiff. They can survive deep water flow. Under clear water, the plant can survive up to two months.

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