Sparganium stoloniferum; bur reed

Japanese: ミクリ(実栗) - ミクリ（英語表記）Sparganium stoloniferum; bur reed

A perennial plant of the family Eucalyptaceae. It is widely distributed throughout Japan, Asia, Europe, and North Africa. It grows in shallow water such as ponds, swamps, and ditches. The stem is erect, 50-100 cm tall, and somewhat soft and hairless. The leaves are longer than the stem, rise above the water surface, linear, blunt, and have a ridge on the underside. From June to August, branches emerge from the upper leaf axils, and the branches with flower spikes have enveloping leaves. The flowers are unisexual, producing spherical heads. The numerous male inflorescences are white and grow at the top of the branches. The female inflorescences are about five in number, green, and grow at the bottom of the branches. When ripe, they become green, spherical aggregate fruits with many projections. The drupes have ridges and are pointed at the tip.

Source: Encyclopaedia Britannica Concise Encyclopedia About Encyclopaedia Britannica Concise Encyclopedia Information

Japanese:

ミクリ科の多年草。日本全土，アジア，ヨーロッパ，北アフリカに広く分布する。池や沼，溝などのやや浅い水中に生える。茎は直立し，高さは 50～100cm，全体はやや軟らかく毛はない。葉は茎より長く，水面に抜き出て立ち，線形で鈍頭，下面には稜が1本ある。6～8月頃，上部の葉腋から枝を出し，花穂のつく枝には包状葉がある。花は単性で球状の頭花をつくり，雄花序は多数あって白色，枝の上方につく。雌花序は約5個で枝の下方につき，緑色である。熟すると緑色球形の集合果となり突起が多い。核果には稜があり先はとがる。

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