Similar to P. rongrong but distinguished by the plant being covered entirely with short pubescence, leaf lobes with numerous coarse serrations on the margin, leaf abaxial surface pale green or pale purple, flower throats white with distinct purple nectar guides. Grows in crevices of cliffs in a dry limestone gorge. Only one population has been found at Wudu Reservoir, Jiangyou county, Sichuan, and since the cliffs are used by rock climbers, it is considered critically endangered.