Ukishiba - Ukishiba

Japanese: ウキシバ - うきしば

A perennial grass of the grass family that grows underwater or near water in ponds and marshes (illustration). The stems are long and slender, soft, and root in the muddy soil at the bottom of the water, branching at the base, with the upper part often floating on the water's surface. The name "Ukishiba" (floating grass) comes from the way it grows, but this species is not related to turf grass, but is more closely related to Japanese turf grass. The leaves are short and linear, about 4 cm long and 3 mm wide, and whitish green, at the nodes of the stem. In midsummer, solitary green inflorescences appear at the tips of the branches and at the top of the stem. The inflorescences are cone-shaped, but because the branches stand along the axis, they appear spike-like, and are 3 to 6 cm long.

Source: Heibonsha World Encyclopedia, 2nd Edition Information

Japanese:

池沼の水中または水辺に生えるイネ科の多年草（イラスト）。茎は細長く，軟らかく，水底の泥土の中に根を下ろし，基部で枝分れして，上部は水面に浮かぶことが多い。浮芝の名はこの生え方に由来するが，本種はシバとは縁遠く，チカラシバに近縁である。葉は茎の節につき，短い線形で，長さ4cm前後，幅3mmで，白っぽい緑色である。盛夏の頃に，枝の先端と茎頂に緑色の花序を単生する。花序は円錐状であるが，枝が軸に沿って立つから穂状に見え，長さ3～6cm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

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