Huanglian places of origin distribution and change from herbal-works

The herbal-works recorded that the origin production places of Huanglian had gone through dynamic condition of distribution and change. During Pre-Qin and Qin-Han Dynasty, the origin production places of Huanglian were small and limited. During Weijin-Nanbei Dynasty, the origin production places of Huanglian grew in number gradually. During Sui-Tang and Song-Yuan Dynasty, the origin production places of Huanglian were enlarged quickly. During Ming and Qing Dynasty, the origin production places of Huanglian were expended small-size. The origin production places of Huanglian were enlarged because its functions and demands added and planting-technology skills developed. The records of the herbal-works were not complete, we should pay attention to the other works, so as to ascertain the realorigin production places of Huanglian exactly and scientifically.