Petrocodon wui F.Wen & R.B.Zhang, sp. nov. A plants in bloom in natural habitat B plant in flower C upward view of plant showing the abaxial surfaces of leaf blade and petiole D flowering cyme E cymes, calyx and immature capsule F frontal view of corolla G lateral view of corolla and extended pistil H opened corolla I four fertile stamens J calyx and pistil K mature and dehiscent capsules (Photographed by F. Wen and R.B. Zhang).