Objective: To campare and evaluate the quality of Polygonum capitatum from different habitats. Method: Quercetin

quercitrin

gallic acid

general flavone and extractives of 41 wild and cultivated P. capitatum were determined by HPLC

US and water soluble extractive method.Through the content of five indicated ingredients as the index

the quality of 41 wild and cultivated P. capitatum was assessed by principal componentanalysis and cluster analysis method. Result: The differeces of quercetin

quercitrin

gallic acid

general flavone and extractives among P. capitatum from different habitats are significant. In addition to sample 2 from town of Liangyan Bijie County

the remaining samples are up to the medical requirements.The quality of P. capitatum in east of guizhou is the best. Conclusion: The chemical composition above in P. capitatum is more influenced by the place of origin and the type of soil comparatively than by the elevation.The wild P. capitatum in the west guizhou is widespread

but the content of the indicated ingredient-quercetin-is lower than the east one and other provinces

so reaches the same conclusion to the comprehensive quality. The content and the comprehensive quality of quercetin of P. capitatum in the east guizhou is better.

which proves the rationality of GAP base of P. capitatum in the southeast guizhou.This study build up the reference to the quality

excellent provenance selection and GAP production of P. capitatum.