Species delimitation in the Populus laurifolia complex (Salicaceae) based on phylogenetic and morphometric evidence - Wei, Xueya; Cui, Xingyong; Yuan, Fulin; Zhou, Kerou; Zhou, Liwei; Zhao, Changli; Guo, Shaoyu; Shang, Ce; Zhang, Zhixiang (Frontiers in Plant Science, 2025)