A perennial plant of the Cyperaceae family that grows in colonies in ponds and lakes (illustration). The stems rise from thick rhizomes that are horizontally embedded in the muddy soil at the bottom of the water, are cylindrical, nodeless, 1.5 m tall, about 1 cm wide, and gray-green in color. Occasionally, there are varieties with stems that have yellow and green stripes, and they are called f. zebrinus and are used for ornamental purposes. The leaves form leafless sheaths that encase the base of the stem. At the end of summer, the plant produces pseudolateral inflorescences a few centimeters below the top of the stem. The parts that appear to be a continuation of the stem above the inflorescence are bracts. Source: Heibonsha World Encyclopedia, 2nd Edition Information |
池や湖水に群生するカヤツリグサ科の多年草(イラスト)。茎は水底の泥土中に横にはった太い根茎から立ち上がり,円柱形で節がなく,高さ1.5m,幅約1cm,灰緑色をしている。たまに茎が黄と緑の縞模様になった品種があり,シマフトイf.zebrinusと呼んで観賞用とする。葉は無葉身の鞘(さや)となって,茎の根もとを包む。夏の終りに茎の頂部から数cm下方に花序を仮側生につける。花序より上部にある茎の続きにみえる部分は苞である。
出典 株式会社平凡社世界大百科事典 第2版について 情報 |
<<: Wharf - Futou (English spelling)
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