1. Department of Plant Resources, Guangzhou Institute of Forestry and Landscape Architecture, Guangzhou, PR China
2. College of Forestry and Landscape Architecture, South China Agricultural University, Guangzhou, PR China
3. Chemistry and Pharmacy School, Zhuhai College of Jilin University, Zhuhai, PR China
4. Guangxi Institute of Botany, The Chinese Academy of Sciences, Guilin, PR China