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''Cleistocactus'' is a genus of columnar cacti native to mountainous areas - to - of Peru, Uruguay, Bolivia and Argentina. The name comes from the Greek ''kleistos'' meaning closed because the flowers hardly open. The stems are tall and mostly slender and often many-branched with numerous ribs with closely set areoles and spines. The flowers are tubular and the tips hardly open with only the style and stamens usually protruding. ==Synonymy== The following genera have been brought into synonymy with this genus: *''Akersia'' Buining *''Bolivicereus'' Cárdenas *''Borzicactella'' H.Johnson ex F.Ritter *''Borzicactus'' Riccob *''Borzicereus'' Fric & Kreuz. (orth. var.) *''Cephalocleistocactus'' F.Ritter *''Cleistocereus'' Fric & Kreuz. (orth. var.) *''Clistanthocereus'' Backeb. *''Demnosa'' Fric *''Gymnanthocereus'' Backeb. *''Hildewintera'' F.Ritter *''Loxanthocereus'' Backeb. *''Maritimocereus'' Akers *''Pseudoechinocereus'' Buining (nom. inval.) *''Seticereus'' Backeb. *''Seticleistocactus'' Backeb. *''Winteria'' F.Ritter *''Winterocereus'' Backeb. Cleistocactus strausii flow.jpg|''Cleistocactus strausii'' File:Cleistocactus micropetalus F. Ritter.PNG|''Cleistocactus micropetalus'' F. Ritter, photo taken at Bedugul Botanical Garden, Bali, Indonesia 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「Cleistocactus」の詳細全文を読む スポンサード リンク
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