NEW TAXA OF THE GENUS ARISTOLOCHIA FROM SICHUAN Relationships between ecosystem factors and contents of megastigmatrienones in flue-cured tobacco leaves in Liangshan,Sichuan Province Impatiens liangshanensis Q.Luo, a new species of Impatiens (Balsaminaceae) from Sichuan, China The Preliminary Floristical Study on Mid-Montane Humid Evergreen Broad-Leaved Forest in Mt. Wuliangshan Landscape pattern analysis of red panda habitat in Liangshan Mountains AROIDS FROM THE WULIANGSHAN MOUNTAINS The Floristic Characteristics and Its Significance in Conservat ion of Semi-humid Evergreen Broad-leaved Forests Pollen Morphology of Tibetia (Fabaceae) from the Hengduan Mountains, with Emphasis on the Taxonomical Status of Tibetia liangshanensis The Identity of Berberis wuliangshanensis C. Y. Wu ex S. Y. Bao and B. jingguensis G. S. Fan et X. W. Li (Berberidaceae) Plants among Yi People’s Traditional Folk Customs and Their Cultural Significance in Liangshan Yi Autonomous Prefecture, Sichuan