Study on the Floristic Phytogeographical Differentiation of Xizang Tibet Additional Notes on Scleria (Cyperaceae) of Xizang (Tibet) Resolving place names in Amdo and Kham: A gazetteer for the Hengduan Mountains region of Southwest China Aeginetia (Orobanchaceae),a new record to Xizang (Tibet) Holocene Palynological Records in Lake Selincuo,Northern Xizang Iris latistyla f. albiflora, a New Form of Iris (Iridaceae) in Xizang,China Studies on the Characteristics of Picea likiangensis var. linzhiensis Communities in Xizang (Tibet), China Frigidorchis,A Newly Recorded Genus of Orchidaceae from Xizang (Tibet) Phylogenetic Origin of Phyllolobium with a Further Implication for Diversifiction of Astragalus in China Structure and Quality Evaluation of Rangeland Resources of Xizang (Tibet) Autonomous Region