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Nerium
''Nerium oleander'' 〔''Sunset Western Garden Book,'' 1995:606–607〕 is an evergreen shrub or small tree in the dogbane family Apocynaceae, toxic in all its parts. It is the only species currently classified in the genus ''Nerium''. It is most commonly known as oleander, from its superficial resemblance to the unrelated olive ''Olea''. It is so widely cultivated that no precise region of origin has been identified, though southwest Asia has been suggested. The ancient city of Volubilis in Morocco may have taken its name from the Berber name ''oualilt'' for the flower.〔(【引用サイトリンク】title=Archaeological Site of Volubilis )〕 Oleander is one of the most poisonous of commonly grown garden plants.
== Description ==
Oleander grows to tall, with erect stems that splay outward as they mature; first-year stems have a glaucous bloom, while mature stems have a grayish bark. The leaves are in pairs or whorls of three, thick and leathery, dark-green, narrow lanceolate, long and broad, and with an entire margin. The flowers grow in clusters at the end of each branch; they are white, pink to red, diameter, with a deeply 5-lobed fringed corolla round the central corolla tube. They are often, but not always, sweet-scented. The fruit is a long narrow capsule long, which splits open at maturity to release numerous downy seeds.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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