Section Petiolares Subsection Davidii Holotype specimen: Y. Xu & S. Yuan Xul40005 resides at IBSC - South China Botanical Garden, Guangdong and Paratype specimens: X.L. Jiang (H.L. Tsiang) 11201 and Y. Xu & TJ. Liu Xul40128 resides at IBSC - South China Botanical Garden, Guangdong.
Epithet: Named for Prof. Yu Dejun (Yu Te Tsun). Distribution: Sichuan, China.
A new Davidii described from the area near Ya-an, Sichuan. Distinguished by its acute, apiculate leaves with sharply dentate leaf margins and distinct petioles. Flowers early in February - March.