Abstract:

Dulongjiang is situated in western Gongshan Dulong and Nu Nationalities Autonomous County of Yunnan Province, extending from 97 45'-98 30'E,27 40'-28 50'N with an area 1994 km2.Dulongjiang area is the north part of Burma-Malaya Geoblock of Gondwanaland. During th Mesozoic Era it collided with the Eurasian Plate, and became the southwestern borderland of East Asia Continent. Since the Miocene Epoch, Burma-Malaya Geoblock has moved 450 km northward from the equator tropical zone and also shifted right. The history process caused a deep influence on the flora of Dulongjiang region. This paper discusses the floristic structure of families, genera and species, as well as features of Dulongjiang flora. It is closely related with the geoblock movement.

Key words: Dulongjiang Region, Seed plants, Flora