1Department of Earth and Environment, Florida International University, Miami, USA
2Center for Tropical Plant Conservation, Fairchild Tropical Botanic Garden, Coral Gables, USA
3Guangxi Key Laboratory of Subtropical Bioresources Conservation and Utilization, Guangxi University, Nanning, China
4State Key Laboratory of Systematic and Evolutionary Botany, Institute of Botany, Chinese Academy of Sciences, Beijing, China