[Botanical origins of Chinese drug caowu produced in Sichuan].

We have made an investigation on the botanical origins of 6 species and 2 varieties of the traditional Chinese drug Caowu produced in Sichuan, and found out that the main species available on the market are Aconitum hemsleyanum and A. hemsleyanum var. leucanthum, while A. legendrei comes second. A key for their identification is presented in this paper.