关键词: 五台山, 种子植物, 区系分析, 类平均聚类

Abstract: Wutai Mountains, belonged to Taihang Ranges and being one of the four Buddhist shrines of China, are located in North Shanxi and between 38°30'~39°15'N, 112°50'~113°50'E. There are 865 species of seed plants, belonging to 392 genera and 92 families in Wutai Mountains, among which gymnosperms have 3 families, 6 genera and 7 species, and angiosperms have 89 families, 386 genera and 858 species. The angiosperms are composed of dicotyledon and monocotyledon, having 76 families, 294 genera and 699 species, and 13 families, 92 genera and 159 species, respectively. The flora of genera in Wutai Mountains has some typical characteristics of warm-temperate deciduous broad-leave forest. Among them, temperate distribution elements, having 255 genera and accounting for 73.48% in total genera (excluding cosmopolitan), hold a significant dominant position. Moreover, among the floristic elements of species, endemic species to China have 286 species, accounting for 33.41% in total species, and makes evidently dominant. They are the major elements of the edificatos and dominant species of dominant vegetation types, such as Larix principis-rupprechtii, Pinus tabulaeformis, Picea wilsonii, Rosa xanthina, Ostryopsis davidiana, Myripnois dioica et al. Furthermore, the floristic elements of the genera of the seed plants of Dongling Mountains, Baihua Mountains in Beijing, Changbai Mountains in Jilin, Daqing Mountains in Inner Mongolia, Guandi Mountains, Taiyue Mountains, the Southern of Taihang Mountains and Zhongtiao Mountains in Shanxi, Taibai Mountains in Shaanxi and Wutai Mountains are studied comparatively by group-average clustering each other, respectively. The results are as follows: There is higher homogeneity and closely relationship between the floristic elements of Dongling, Baihua and Wutai Mountains, and some similarity between that of Changbai and Wutai Mountains. However, there are some differences between that of Daqing, Guandi and Wutai Mountains, and some significant differences between that of Taiyue, Taihang, Zhongtiao Mountains and Wutai Mountains. Moreover, there are significant differences between that of Taibai and Wutai Mountains. The main reasons for those are resulted from the differences among their eco-geographic conditions and floristic elements and among the edificatos and dominant species of vegetation types.

Key words: Wutai Mountains, Seed plant, Floristic analysis, Group-average clustering