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The Amur barberry (Berberis amurensis) belongs to Berberidaceae (the Barberry family). It is a small deciduous tree that is native to Japan, the Korea Peninsula, northeastern China and the Russian Far East. This trre grows in deciduous broad-leaved forests in mountainous area and can reach about 3 m in height. The spines up to 20 mm long bear on the smaller branches. The leaves are elliptical, paper-thin, up to 10 cm long. The edge of leaf has fine spiny serrations. The racemes are borne on the tips of short branches, and a dozen or so yellow flowers hang down and bloom from May to June. The fruits are berries, red, oblong, about 10 mm long, and ripen in October. It is called "黄芦木" (huang lu mu) in Chinese.
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