What are the latest places of origin of Corydalis yanhusuo?

The places of origin of Corydalis yanhusuo are mainly located in Anhui, Jiangsu, Zhejiang, Hubei and Henan (Tanghe, Xinyang), and it has been introduced and cultivated in some areas (Shaanxi, Gansu, Sichuan, Yunnan and Beijing). It blooms in summer, and its tubers are a well-known commonly used traditional Chinese medicine, containing more than 20 kinds of alkaloids, and are used to move qi and relieve pain, invigorate blood and dissipate stasis, and treat traumatic injuries.

Corydalis yanhusuo prefers a warm and humid climate and mainly grows in hilly grasslands.