In this paper, The major plant communities and its vertical distribution in
Guhsiang region of southeastern Tibet are describted as follows:
1. In accordance with the conditions of coefficient of similarity of the species
between narrow belts, the vertical vegetational distribution on the southern and nor-
thern slopes of Guhsiang region may be divided into eight zones (fig. 1).
2. The seven types of plant communities are describted. The relationships bet-
ween the distribution of plant communities and humidity-warmth conditions are shown
(fig. 2)
3. Being affected by different humidity-warmth conditions, the differences bet-
ween vegetation zones in numbers of species are rather well-marked (table 3).
