Maintenance of species boundaries in three sympatric Ligularia (Senecioneae, Asteraceae) species
Ningning Zhang, Yongpeng Ma, Ryan A. Folk, Jiaojun Yu, Yuezhi Pan and Xun Gong
J Integr Plant Biol . 2018, (10): 986 -999 .  DOI: 10.1111/jipb.12674