峨眉山槭属植物的地理分布和区系特点

THE GEOGRAPHICAL DISTRIBUTION AND FLORISTIC FEATURES OF THE GENUS ACER FLORA IN MT. EMEI IN CHINA

本文报道了分布于四川峨眉山槭属植物,计26种1变种。讨论了槭属植物在峨眉山的垂直分布与水平分布规律。峨眉山槭属植物的区系组成是亚热带和温带东亚区系成分。

Situated in western part of Sichuan Province, 29°30'N, 103°20' E, the sacred Mt. Emei is one of the well-known large mountains in China. Its summit in about 3100 m above sea level with a relative height of 2550 m.The Acer flora in Mt. Emei so far known has 26 species (Table 1.).The floristic features of the Acer flora in Mt. Emei:1.Mt. Emei is very rich in the genus Acer species. The Acer flora in this muntain so far known as 26 species covers over 61.9% of the total the Acer species in Sichuan, and is 17.5% of the total the Acer species in China.2. The genus Acer in this mountain are comlpex in floristic components as indicated below:( 1 ) one species are widespread, covering the whole East-Asian region.(2 ) Seven species are the elements of the Sino-japanese Subregion.(3 ) Eleven species are the elements of the Sine-Himalayan Subregion.(4) Seven species are the elements of Sino-japanese Sabregion and Sino-Himal-ayan Subregin.( 5 ) there are 1 endemic Section ( contains 1 species ).The floristic features of Acer flora of Mt. Emei are rich in species, comparatively complex in components, and rather marked in endemic species. The Acer flora in Mt. Emei mainly consists of the subtropical and temperate East-Asian elements.