Huang, Q.-L., Fei, W.-Q., Wu, H.-S., Zeng, Y.-P., Yuan, Q. and Yang, Q.-E. 2024. Clematis sinii and C. xinhuiensis (Ranunculaceae), respectively described from Guangxi and Guangdong of China, are merged with C. meyeniana, a species widely distributed in eastern and southeastern Asia. Phytotaxa. 652, 3 (Jun. 2024), 171–207. DOI:https://doi.org/10.11646/phytotaxa.652.3.1.