横断山区节肢蕨属的研究

文本报道了分布在横断山区域的节肢蕨属(Arthromeris)植物,已知12种,1变种;其中新种2个。讨论了该属在本区的地理水平和垂直分布,并初步探讨了在这一地区分布的种类和亚洲分布的种类之间的地理亲缘关系。

NOTES ON THE GENUS ARTHROMERIS FROM HENGDUAN MOUNTAINS REGION

The Hengduan Mountains region is a zone including the southeastern edge of Qinghai-Xizang, western Sichuan and northwestern Yunnan. There are abundant forests, the vertical distribution of the vegetation is very evident and formed a number of particular ecologic enviroment. After examing whole specimens of Arthromeris collected throuth Hungduan Mountains region, the author has reported the species and geographic distribution of the genus Arthromeris in this region. There are about 12 species of this genus so far discovered in Hengduan Mountains region, which occupy 80% of the total species of (he world and the region is the distribution center of the genus in modern times. The genus Arthromeris seems to be originated along the border of Yunnan and Sichuan and later with the Hengduan Mountains as the center of development. With the progress of the flora evolution, it has radiated as far as Philippines in the east, and through Nepal to northwestern India, northern Vietnam in the south, and northward to the southern slope of Tsinling Mountains. From the facts of the Arthromeris geographic distribution, it is evident that the genus belong to tropical mountains region's and subtropical region's colony.