Abstract: The habitat of mountains is the wettest dtle to the cloud belt and orog- rapllic rain. The vegetations of vertical zone all possess wet charactcr. The main vergetation of tropical mountains is the mountain rain forest; and the vertical zone of subtropica1 mountains is characterized by the humid evergreen broad-leaf forest.In the subtropical region, the enviroments of incised valley are very dry and hot because of the influences of a strong local up-valley air current and the foehn. The main vegetation at the bottom of the dry valley is the type of Savannah and succulent thornbush, which should be a product of the local enviroment or an azonal vegetation.

Key words: vegetation, regularity, features, Yunnan