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''Cyperus papyrus'' (papyrus sedge, paper reed, Indian matting plant, Nile grass) is a species of aquatic flowering plant belonging to the sedge family Cyperaceae. It is a tender herbaceous perennial, native to Africa, and forms tall stands of reed-like swamp vegetation in shallow water. Papyrus sedge (and its close relatives) has a very long history of use by humans, notably by the Ancient Egyptians—it is the source of papyrus paper, parts of it can be eaten, and the highly buoyant stems can be made into boats. It is now often cultivated as an ornamental plant. In nature it grows in full sun, in flooded swamps and on lake margins throughout Africa, Madagascar and the Mediterranean countries. 〔(【引用サイトリンク】title=Cyperus papyrus )〕 ''C. papyrus''〔 (【引用サイトリンク】title=''Cyperus papyrus'' AGM )〕 and the dwarf cultivar ''C. papyrus'' 'Nanus'〔 (【引用サイトリンク】title=''Cyperus papyrus'' 'Nanus' AGM )〕 have gained the Royal Horticultural Society's Award of Garden Merit. ==Description== This tall, robust, leafless aquatic plant can grow high. It forms a grass-like clump of triangular green stems that rise up from thick, woody rhizomes. Each stem is topped by a dense cluster of thin, bright green, thread-like stems around in length, resembling a feather duster when the plant is young. Greenish-brown flower clusters eventually appear at the ends of the rays, giving way to brown, nut-like fruits. The younger parts of the rhizome are covered by red-brown, papery, triangular scales, which also cover the base of the culms. Botanically these represent reduced leaves, so strictly it is not quite correct to call this plant fully "leafless". 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「Cyperus papyrus」の詳細全文を読む スポンサード リンク
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