1. Key Laboratory of Biogeography and Bioresources in Arid Land, Xinjiang Inst. of Ecology and Geography, Chinese Acad. of Sciences; CN-830011 Urumqi PR China
2. Shrub Sciences Laboratory, Intermountain Research Station, Forest Service; U.S. Dept of Agriculture; Utah 84601 USA
3. Shanghai Chenshan Plant Science Research Center, Shanghai Chenshan Botanical Garden, Chinese Acad. of Sciences; CN-201602 Shanghai PR China
4. Inst. of Botany, Chinese Academy of Sciences; CN-100093 Beijing PR China