The flora of the seed plants of Qiyun moun-tainous region in Anhui Province

There are 867 species(including varieties)of seed plants,which belong to 511 genera and 125 families in Qiyun Mountainous Region (QMR). Compared with those of five adjacent mountainous regions,the integrative coefficient of seed plants flora in QMR is 0.219,which is bigger than those of Mt. Liugujian,but smaller than that of Huangshan(0.089)?Qingliangfeng(0.193)?Guniujiang(0.361)and Tiantangzhai(0.007). Therefore,the flora is relatively rich. The geographic distribution of 511 genera can be grouped into 15 distribution types,among which the tropical element makes up 42.0%,while the temperate element makes up 54.3%,taking up a predominant position. The flora possesses midsubtropical characteristics,the floristic geographic elements are complex. By analysis of the floristic relationship among adjacent mountainous regions,the flora belongs to South Anhui mountainous district and the flora rigion of East China. The flora has the closest relationship with that of Mt. Huangshan.