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Floristic zoning map of Yunnan province and sampling sites of Amomun tsao-ko (A. tsao-ko). I (the south and southwest), II (the southeast), III (the middle plateau), IV (the west and northwest) and V (the northeast) represent different floristic zones of Yunnan province. The longitude and latitude of each region are labeled. A picture of A. tsao-ko (dried ripe fruit) is shown.
