关键词: 种子植物, 区系分析, 金汤孔玉自然保护区

Abstract: Jintang-Kongyu Nature Reserve is located in the east of the Hengduanshan Region, with altitude from 1700 m to 5712 m and area of 26908.6 hm². According to preliminary investigation and the collected documents, the spermatophyte flora from the Reserve consists of 381 species in 201 genara of 68 families(Among them, 20 species in 11 genara of 4 families belong to gymnospermae, 68 species in 41 genara of 6 families belong to monocotyledoneae, 293 species in 149 genara of 58 families belong to dicotyledon). This flora has taxa from primitive to advanced. The result of floristic analysis shows that all of the families can be grouped into 12 distribution types(or subtypes), and genera into 23. In families, Pan-tropic and temperate distributed components occupy 74.07% of the total. In genera, tropic components occupy 32.59% of the total, North Temperate distribution types occupy 34.25% of the total, other temperate components occupy 15.47% of the total. This flora has a tight relationship with the following distribution types:E. Asia and N. Amer., E. Asia and Mexico disjunction, Mediterranean, W. Asia to C. Asia, C. Asia to Himalaya and S. W. China, E. Asia, Sino-Himalaya, Sino-Japan. This flora has 5 species endemic to Hengduanshan Region or Sichuan. The characteristic of this flora mostly is temperate, but with lot of tropical, and with an archaic origination, complicated elements, an extensive relationship with the flora from neighboring regions.

Key words: spermatophyte, floristic analysis, Jintang-Kongyu nature reserve