1. CAS Key Laboratory of Aquatic Botany and Watershed Ecology, Wuhan Botanical Garden, Chinese Academy of Sciences Wuhan Hubei China
2. Center of Conservation Biology, Core Botanical Garden, Chinese Academy of Sciences Wuhan Hubei China
3. Univ. of Chinese Academy of Sciences Beijing China
4. College of Horticulture and Forestry Sciences, Huazhong Agricultural Univ. Wuhan Hubei China
5. Yunnan Key Laboratory of Plant Reproductive Adaptation and Evolutionary Ecology, Yunnan Univ. Kunming China
6. Dept of Biosciences, Rice Univ. Houston TX USA