Finding new sources from "using different plants as the same herb": A case study of Huang-lian in Northwest Yunnan, China.

Ethnopharmacological Relevance: Traditional and local medicinal knowledge would be useful for finding pharmaceutical resources. Ethnopharmacological methods, especially quantitative analysis could help us to pre-screen herbs in field studies. "Using different plants as the same herb" is common in both traditional and local medicinal systems in China.