title: [The crude drugs of special location of Sichuan as viewed from the tribute drugs in the Tang dynasty].
abstract: As an important location for drug production in history, the tribute drugs from Sichuan in the Tang dynasty occupied a very large quotas. Hence, the study on Sichuan tribute drugs is conducive to the understanding of the distribution of crude drugs of special location and its rules of evolution in different historical periods, with rather significance for the exploration and utilization of crude drugs. There is a rich resource of crude drugs in Sichuan, exhibiting a conspicuous and zone distribution. According to historical documents of the Tang dynasty, the characteristics of the Sichuan tribute drugs include rich species, extensive distribution, rich special and valuable drugs, and processed drugs. There are over 40 kinds of crude drugs of special location produced in Sichuan. The tribute drugs of the Tang dynasty reveal the evolution of crude drugs of special location. Occupying an important position of crude drugs in the whole country, the crude drugs produced in Sichuan are not necessarily to be all tribute drugs.
authors.affiliation: Institute of Historical Geography, Southwestern Normal University, Chongqing 400715.
authors.forename: Qi-Yan
authors.initials: QY
authors.lastname: Yan