关键词: 翅果油树, 分布区, 种子植物, 区系分析, 山西

Abstract: Elaeagnus mollis is an endemic to China, being one of the China protected two grade rare and endangered plants, and distributed mainly in hills and lower mountains in southern Shanxi. E. mollis areal is located in hills of the southern tip of Luliang Ranges and the middle and western of Zhongtiao Ranges in Shanxi, 110°36'~111°56' E, 34°52'~36°05' N, which is the transit from the basin of southern Shanxi to the hills surrounding the basin.There are 905 species of seed plants, belonging to 449 genera and 95 families in E. mollis areal, among which gymnosperms have 2 families, 2 genera and 4 species, and angiosperms have 93 families, 447 genera and 901 species. The angiosperms are composed of dicotyledon and monocotyledon, having 78 families, 312 genera and 714 species, and 15 families, 135 genera and 191 species, respectively.The flora of genera in E. mollis areal has some typical characteristics of warm temperate deciduous broad leave forest. Among them, temperate distribution elements have 276 genera and accounting for 68.66% and tropic distribution elements have 106 genera and accounting for 26.38% in the total(excluding cosmopolitan), respectively, and both them make significant dominant or have some indicating meaning for the floristic elements and vegetation. Moreover, among the floristic elements of species, endemic species to China have 369 species, accounting for 41.65% in the total species, and makes evidently dominant. They are the major elements of the edificatos and dominant species of dominant vegetation types, such as Pinus tabulaeformis, Pinus armandi, Pinus bungeana, Quercus baronii, E. mollis, Rosa xanthina, Ostryopsis davidiana, Sophora viciifolia, Forsythia suspensa, Myripnois dioica etc. Finally, the strategies for the sustainable utilizing and protection of E. mollis resource.

Key words: Elaeagnus mollis, areal, seed plants, floristic analysis, Shanxi Pronvince