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''Datura stramonium'', known by the common names Jimson weed or Devil's snare, is a plant in the nightshade family. It is believed to have originated in Mexico,〔(Flora of China, 曼陀罗 man tuo luo ''Datura stramonium'' Linnaeus, Sp. Pl. 1: 179. 1753. )〕 but has now become naturalized in many other regions.〔(Biota of North America Program, 2014 county distribution map )〕〔(Atlas of Living Australia, ''Datura stramonium'' L., Common Thornapple )〕 Other common names for ''D. stramonium'' include thornapple and moon flower, and it has the Spanish name Toloache. Other names for the plant include hell's bells, devil’s trumpet, devil’s weed, ''tolguacha'', Jamestown weed, stinkweed, locoweed, pricklyburr, and devil’s cucumber.〔(【引用サイトリンク】title=Thorn-apple, Datura stramonium - Flowers - NatureGate )〕 Datura has been used in traditional medicine to relieve asthma symptoms and as an analgesic during surgery or bonesetting. It is also a powerful hallucinogen and deliriant, which is used spiritually for the intense visions it produces. However, the tropane alkaloids responsible for both the medicinal and hallucinogenic properties are fatally toxic in only slightly higher amounts than the medicinal dosage, and careless use often results in hospitalizations and deaths. ==Description== ''Datura stramonium'' is a foul-smelling, erect, annual, freely branching herb that forms a bush up to tall. The root is long, thick, fibrous and white. The stem is stout, erect, leafy, smooth, and pale yellow-green. The stem forks off repeatedly into branches, and each fork forms a leaf and a single, erect flower.〔 The leaves are about long, smooth, toothed,〔 soft, and irregularly undulated.〔 The upper surface of the leaves is a darker green, and the bottom is a light green.〔 The leaves have a bitter and nauseating taste, which is imparted to extracts of the herb, and remains even after the leaves have been dried. ''Datura stramonium'' generally flowers throughout the summer. The fragrant flowers are trumpet-shaped, white to creamy or violet, and long, and grow on short stems from either the axils of the leaves or the places where the branches fork. The calyx is long and tubular, swollen at the bottom, and sharply angled, surmounted by five sharp teeth. The corolla, which is folded and only partially open, is white, funnel-shaped, and has prominent ribs. The flowers open at night, emitting a pleasant fragrance, and are fed upon by nocturnal moths.〔 The egg-shaped seed capsule is in diameter and either covered with spines or bald. At maturity, it splits into four chambers, each with dozens of small, black seeds.〔 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「Datura stramonium」の詳細全文を読む スポンサード リンク
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