An annual plant of the legume family. It grows in rice fields and marshes near water, with upright stems 50-100cm tall and hollow at the top. The leaves are alternate and even-pinnately compound, with 20-30 pairs of linear leaflets 6-9mm long and lanceolate stipules. From summer to autumn, it produces sparse racemes in the leaf axils, with yellow butterfly-shaped flowers. The fruit has nodes and contains 6-8 seeds, which detach at the nodes when ripe. Source: Encyclopaedia Britannica Concise Encyclopedia About Encyclopaedia Britannica Concise Encyclopedia Information |
マメ科の一年草。田地や水辺の湿地に生え,茎は高さ 50~100cm,直立し,上部は中空。葉は互生し,偶数羽状複葉で,小葉は長さ6~9mmの線形で 20~30対あり,披針形の托葉がある。夏から秋に,葉腋にまばらに総状花序を生じ,黄色の蝶形花をつける。果実には節があり,種子を6~8個有し,熟すると節々で離れる。
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