根皮

For the different part of Tripterygium wilfordii obtained in summer，the content range of triptolide in its given order was whole root,root bark,debark root,stem and leaves respectively.

夏季的雷公藤不同部位雷公藤内酯醇的含量低，依次为全、、去、茎、叶。

Its dried roots (Chinese name: Jinquegen) have been used in China as a folk medicine for the treatment of asthenia syndrome, vascular hypertension, leukorrhagia, bruises and contused wounds.

其或（药名：金雀）民间主用于治疗虚损劳热、、血压、关节痛风、跌打损伤等。