Two species of the Rhodiola yunnanensis species complex distributed around the Sichuan Basin of China: Speciation in a ring?
Zi-Meng Wang, Shi-Yong Meng, and Guang-Yuan Rao
Journal of Systematics and Evolution . 2022, (5): 1092 -1108 .  DOI: 10.1111/jse.12754