As one of the most important botanical works in ancient China,On the Plants and Their Names and Graphs of Wu Qijun recorded a total of 1714 species of plants in 12 categories,including 91 in-troduced plants,in which 13 of them were pointed out in On the Plants and Their Names and Graphs and 12 in Long Compilation On the Plants and Their Names and Graphs.Besides,66 of them were pointed out in On the Plants and Their Names and Graphs without indicating their introduction identity.All of them origi-nated from different regions of the world with their introduction time spanning thousands of years from pre-history to the Qing Dynasty.The introduction time and initial area of these plants reflect that the peak of the introduction of foreign plants in ancient China was in the Han Periods,the Sui,Tang,the Five Dynasties and the Ming and Qing Dynasties,and the initial introduction area also experienced the change from the central and western regions of China to the southeast region.From the 91 species of foreign plants recorded in the On the Plants and Their Names and Graphs,it can be seen that its special value surpasses the botanical works of the previous generation,whether it was because of Wu Qijun's own special experience and the con-tent of the On the Plants and Their Names and Graphs was integrated and comprehensive,or the rational un-derstanding of the book based on plants,full of humanistic care and openness,or the exquisite and high-qual-ity atlas in the On the Plants and Their Names and Graphs,all of which make its value far exceed that of the previous botanical works,and also provide valuable information and data for the study of exotic plants in an-cient China.Due to the limitations of the times,there are also some errors in Wu Qijun's record of the import-ed plants from abroad,but they cannot affect the extraordinary position of On the Plants and Their Names and Graphs as a collection of ancient plant books in China.
Wu QijunOn the Plants and Their Names and Graphsintroduced plants
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