Funding for this research was provided by:
National Science Council (NSC 101-2621-B-001-003)
Ministry of Science and Technology, Taiwan (103-2621-B-002004-MY3)
National Natural Science Foundation of China (41161011, 41661012)
Received: 25 March 2020
Accepted: 16 July 2020
First Online: 30 July 2020
Ethics approval and consent to participate
: Guangxi Key Laboratory of Plant Conservation and Restoration Ecology in Karst Terrain, Guangxi Institute of Botany has permits to conduct fieldtrips in Guangxi (to YL and W-BX).
: Not applicable.
: The authors declare that they have no competing interest.