甘肃森林植物区系初步研究

A PRELIMINARY STUDY ON THE FOREST FLORA OF GANSU PROVINCE

现已知甘肃木本植物约1200种,隶属102科,274属。本省森林植物种类丰富,区系成分复杂,温带成分占优势。本文提出了乌鞘岭一带为亚洲荒漠、青藏高原、中国—日本和中国—喜马拉雅4植物亚区在甘肃的交汇处。本省与邻近的陕西、四川植物区系关系最为密切,其属的相似性都在70％以上。本省森林植物区系可区分为5个地区。

Throughout Gansu province, there are over 1200 taxa of woody plants (including some varieties, forms and cultivated ones) belong to 102 families and 274 genera. Gansu is rich in forest which in their turn are very comlex, but dominated by temperate type. wushaoling lies in the transitional centre among the Asiatic desert subkingdom, the Chinghai—Tibet plateau subkingdom, the Sino-Japan forest subkingdom and the Sino—Himalayan forest subkingdom. The similarity coefficient of genera appears over 70% between Gansu and Shanxi, Gansu and Sichuan. So they are closely releted in the forest flora. Through putting to order the recent materials, works have been done in the analytic and comparative study of the geographical elements and the floristic compositions of community dominant in different lo calities, and authors are thereupon able to classify them into 5 regions.