Abstract:

For discussing the origin and the evolution of Peucedanum L., an elementary analysis of the geographic distribution in Peucedanum L. was undertaked. There are 18 species 1 varietis of Peucedanum L. in southwest of china mainly distributing in the altiplano of West of Sichuan in 200-3800 m. The areal-type of Peucedanum L. is Old World Temperate. Besides Sino-Japan forest subkingdom, the most dominant floristic composition of Ligusticum L. is Sino-Himalaya forest subkingdom, especially Hengduan Mountains. Combined with the diversification in morphology, pollen characteristics, and the anatomical characteristics of petioles and so on, as well as abundance of Peucedanum L. in this region, Results of these analyses corroborate that the south west of China is the richness centers and diversity centers. And there are many substitute phenomenones in Peucedanum L. not only in horizon but also in vertical.