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''Crotalaria juncea'', known as brown hemp, Indian hemp, Madras hemp, or sunn hemp,〔〔 is a tropical Asian plant of the legume family (Fabaceae). It is generally considered to have originated in India.〔(''Crotalaria juncea L.''. ) FAO (Food and Agriculture Organization of the United Nations). Accessed September 2014〕 It is now widely grown throughout the tropics and subtropics〔 as a source of green manure, fodder and lignified fiber obtained from its stem. Sunn hemp is also being looked at as a possible bio-fuel.〔Perry, A. (Sunn Hemp Shows Promise as Biofuel Source. ) USDA ARS News. January 3, 2012.〕 It can be an invasive weed and has been listed as a noxious weed in some jurisdictions. It bears yellow flowers and elongate, alternate leaves.〔(''Crotalaria juncea''. ) USDA NRCS Plant Guide.〕 ==Description== Annual, c. 100–1000 cm tall. Many ascending branches, pubescent. Leaf simple, c. 2.5-10.5 cm long, c. 6–20 mm broad, linear or oblong, obtuse or subacute, apiculate, pubescent on both sides, hairs appressed, silky. Petiole c. 1.2-2.5 mm long; stipules almost absent. Inflorescence an erect terminal and lateral raceme, up to 30 cm long, 12-20-flowered. Pedicel c. 3–7 mm long. Bract minute; bracteoles 2, below the calyx. Calyx c. 1.8-2.0 cm long, pubescent, teeth linear-lanceolate. Corolla bright yellow. Vexillum ovate-oblong, slightly exserted. Fruit c. 2.5-3.2 cm long, sessile, pubescent, 10-15-seeded. Fl.Per. May–September. 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「Crotalaria juncea」の詳細全文を読む スポンサード リンク
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