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Common Yam Rhizome (Dioscorea Opposita Thunb.) Introduction
Feb 22, 2018


Source: The rhizome of Dioscorea opposita Thunb, of Dioscoreaceae. Mainly produced in Henan, Jiangsu, Guangxi and Hunan provinces.

Collection and Processing: Crude sample: Collect in winter. Remove the external bark and rootlets, smoke with sulfur and dry in the sun. Naked sample: Macerate the thick and straight crude sample with clean water, roll into cylindrical rods after smoked with sulfur, dry in the sun, and polish. Use crudely or after stir-baked.



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