岷江上游地区种子植物区系初步研究

岷江上游地区位于四川北部,是世界生物多样性保护的热点地区.区系分析结果显示保护区内有种子植物107科,444属,1091种,其中裸子植物6科,11属,42种;被子植物101科,433属,1049种.种子植物科的分布区类型有12个,具有较强的热带性质,泛热带(热带广布Pantropic)型29科,占总科数的40.28%,属的分布区类型有15个,以温带区系成分为主,共225属,占总属数的56.53%,种的分布区类型有15个,其中特有种501个,占总种数的50.81%.该地区区系成分较复杂,特有成分较多,泛热带区系成分具有极其重要的地位.

Preliminary floristic study on the seed plants of Minjiang upriver region

Minjiang upriver region is located in the North of Sichuan province. It is one of the hot spots of biodiversity in the world. Basing on the field investigation and literatures, there are 1091 species of seed plants which belong to 107 families and 444 genera. Among these species, gymnosperms have 6 families, 11 genera and 42 species, and angiosperms have 101 families, 433 genera and 1049 species. 29 pantropic families account for 40.28% of the total families, while 225 temperate genera amount to 56.53% of the total genera and 501 endemic species amount to 50.81% of the total species. In this article, the seed plant flora characteristics of the Minjiang upriver region is analyzed. The result shows that the flora of Minjiang upriver region is complicated. There are many endemic elements in which the pantropic element is the preponderant one.