Morphological distinctiveness of <i>Ligularia tongolensis</i> and <i>L. cymbulifera</i> is maintained between habitats despite bidirectional and asymmetrical introgression in multiple hybrid zones

Li Hu, Rui Yang, Guo-Qian Yang, Gui-Ling Sun, and Xun Gong

Journal of Systematics and Evolution . 2022, (6): 1319 -1330 . DOI: 10.1111/jse.12756