Petrocosmea duyunensis Sheng H.Tang sp. nov. A habitat B flowering plant, rhizome and fibrous roots (inset) C adaxial surface of leaf blade and indumentum (inset) D abaxial surface of leaf blade E, F flowers in front view G flower in side view H flower in back view I, J dissected corolla, stamens and pistil with corolla removed (inset) K stamens and anther (inset) L pistil with abaxial calyx lobes, and adaxial lobes removed M capsules of previous year. (Photographed by Sheng-Hu Tang).