Biosketch
Wen-Ting Jin and Shao-Jun Ling are interested in phytogeography and this work represents a component of their work respectively as a master and PhD student at Hainan University. They and the other authors collaborate on questions of island biodiversity and molecular biogeography based on international collaborations (see TBLab, www.tbscs.org).
Author contributions: Ming-Xun Ren and Jordi López-Pujol conceived the ideas; Wen-Ting Jin and Shao-Jun Ling conducted the fieldwork and collected the data; Wen-Ting Jin, Shao-Jun Ling, and Ming-Xun Ren analysed the data. Wen-Ting Jin and Shao-Jun Ling wrote the first draft of the manuscript. Myong Gi Chung, Jordi López-Pujol, Mi Yoon Chung, and Ming-Xun Ren extensively revised it. All authors read and reviewed the final manuscript.