Acknowledgement
The authors would like to thank the staff of Muong Nhe Nature Reserve, Dien Bien Province for their fieldwork assistance. Thanks are due to the curators of HN, HNU, VNM and P herbaria for the kind permission to access the herbarium material. This research was funded by the Vietnam Academy of Science and Technology (grant no IEBR.CSCL.1/2022-2023) and the framework of the international cooperation program managed by the National Research Foundation of Korea (NRF-2019K2A9A1A0609774512). RKC thanks the Director, Agharkar Research Institute, Pune for the facilities and encouragement.
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