An annual grass of the grass family (illustration) that grows in low-lying, sunny wetlands such as the edges of rice paddies and the banks of rivers. The stems rise from a root with fibrous roots, branch at the bottom, and grow clump-like, 30-50 cm tall, thin, somewhat soft, smooth, and hairless. The leaves are linear and soft, 10-20 cm long and 2-6 mm wide, dark green, sometimes slightly tinged purple. From summer to autumn, a single spike-like inflorescence is produced at the top of the stem. The inflorescence is cylindrical, 6-12 cm long, 5-7 mm wide, dark green with a slight purplish tint, and densely packed with numerous spikelets. Source: Heibonsha World Encyclopedia, 2nd Edition Information |
水田の縁や河川の岸などの低地の日当りのよい湿地に生えるイネ科の一年草(イラスト)。茎はひげ根のある根もとから立ち,下部で枝分れして叢生(そうせい)し,高さは30~50cm,細く,やや軟らかく,平滑,毛はない。葉は少数個茎につき,線形で軟らかく,長さ10~20cm,幅は2~6mmで,濃い緑色,多少紫色を帯びることがある。夏から秋にかけて茎の頂に1個の穂状花序を直立する。花序は円柱形で,長さ6~12cm,幅は5~7mm,多少紫色を帯びた暗緑色で,多数の小穂を密生する。
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 |
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