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The "Kangare-i" (Scirpus triangulatus) belongs to Cyperaceae (the Sedge family). It is a perennial herb that ia native all over Japan, as well as Taiwan, the Korean Peninsula, China, Indonesia and India. This herb grows in bogs and marshes, and can reach up to 1 m in height. The stems are triquetrous and borne radially on the aquatic rootstocks. The spikelets are pale green to pale brown, oblong, and 4-10 spikelets are borne sideways from August to October. The dead stems remain through winter. The Japanese name "寒枯藺" comes from the fact that the withered stems remain in winter. In Taiwanese Chinese, it is "水毛花"; in Chinese, it is "水毛花" (shui mao hua).
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