A Study on the Flora of the Duozhijian Mountainous Regions of the Dabie Mountains in Anhui Province

There are 1313 species (including varieties) of Seed plants, which belong to 569 genera and 143 families in the Duozhijian mountainous regions.The origin of its flora is ancient.There are many ancient families and genera, as well as many relic species.Some type of endemic plants of Dabie Mountains were collected in this regions. By means of contrastive analysis of the floristic elements and compared species between Duozhijian mountainous regions and its adjacent floristic regions, we draw a conclusion that: The flora of whole Dabie Mountains comprises a portion of the flora of East China; The flora of Tianmu Mountains, Huangshan Mountains and Dabie Mountains is an organic whole, which belongs to the central part of the flora of East China; the west line of this central part should be from Macheng to qichun in Hubei province; The demarcation line between East China and Central China should be from Yichang to Xiangfan, and the demarcation line between East China and North China in Anhui province should be from South Huoqiu to Jiashan.