An annual grass of the grass family (illustration) that prefers sunny grasslands, especially slightly moist sandy soil. The stems and leaves grow densely in clumps, are thin, and can reach a height of 30 cm. The leaves are located at the bottom of the stem, linear, about 6 cm long and 4 mm wide, pale green and soft, with long hairs growing sparsely on the edges and sheaths. A long inflorescence is produced at the top of the stem from summer to autumn. The inflorescence has 1 to 4 thin tufts that stand at an angle, but usually there are 2 or 3 tufts, and the branches are shaped like the crotch of an arrowhead. Source: Heibonsha World Encyclopedia, 2nd Edition Information |
日当りのよい草地,とくにやや湿った砂地を好むイネ科の一年草(イラスト)。茎は葉とともに密に叢生(そうせい)し,細く,高さは30cmに達する。葉は茎の下部にあり,長さ6cm,幅4mm内外の線形で,淡緑色で軟らかく,縁と鞘(さや)に長い毛がまばらに生えている。夏から秋に茎の頂に花序を長く抽出する。花序には1~4個の斜めに立った細い総(ふさ)があるが,普通はこの総が2個または3個で,鏃(やじり)の雁股(かりまた)のような枝ぶりをもつ。
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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