Abstract: Pistacia weinmannifolia,a kind of evergreen shrub of Pistacia in Anacardiaceae,which could bear or endure shade,drought resistance in micro barren,alkaline,neutral and acidic soil,is an ideal species in the dry-hot valleys.Based on former research,the spatial distribution and types of Pistacia in dry-hot valley were discussed.The results show that Pistacia is mainly distributed in dry-hot valley and stone desertification region in Yunnan province,concentrated in the open forest and shrubs of the hillside or canyon,at altitudes between 1200-2000m in east/south-east and central parts of Yunnan province.In dry-hot valley,the shrubs are usually distributed as accompanying specie,occasionally as dominant specie,commonly are found in 10 communities,such as Vitex negundo var.Laxipaniclata,Terminalia franchetii Comm,Opuntia monacantha,Euphorbia royleana Comm,etc..

Key words: Pistacia weinmannifolia, community, spatial distribution, dry-hot valley