Morphological distinctiveness of Ligularia tongolensis and L. cymbulifera 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 . 0, (): 0 .  DOI: 10.1111/jse.12756