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The Glomerulate sedge (Cyperus glomeratus) belongs to Cyperaceae (the Sedge family). It is an annual herb that is distributed westward from Kanto district of Honshu to Shikoku, Kyushu in Japan, and widely the Eurasian Continent. This herb grows in lowland bogs or dry riverbeds, and can reach 80-120 cm in height. The stem is solitary or sparse clumping, and the leaves are linear and shorter than stem. The 3-5 cluster-branches are borne on the stem apices and produce globe spikes from August to October. The spikes consist of many, flat and brownish-red spikelets. In Chinese, it is called "頭状穂莎草" (tou zhuang sui suo cao). It is a C4 plant (Plants with C4-type photosynthesis).
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