Abstract:

Through analysing the distribution, ecotope conditions, floristic composition, structure and physiognomy of mixed Davidia involucrata community in Omei mountain, this paper showed the following characteristics of it:

1. The nature of the community is typical of mixed evergreen-deciduous broadleaf forests in mountainous region of midsubtropics.

2. The suitable distributive area of the community is of warm and moist habitat with abundant rainfall, frequent cloud and fog and less sunlight. The land form is precipitous with deep cut valleys.

3. The mixed community is rich in species. The complex floristic composition and the presence of abundant ancient remnants, show that the vegetation of this region has the basic features of the China-Japan flora.

4. The natural regeneration of Davidia involucrata community is accomplished by seedlings and tillers, which makes the phytocommunity steadier. 5. The community is being severely destroyed, emergency measures must be taken to protect them, such as tending of wood and artificial supplementary regeneration etc.