Habitat and morphology of Swertia hongquanii. A–B Habitat C flowering plant D seedlings showing basal leaves E adaxial view of flower showing calyx, corolla, nectaries, stamens and pistil F abaxial view of flower showing calyx and corolla G stem with a pair of leaves H flowering and fruiting plant; centrally, a capsule with persistent corolla can be seen. Photos: Jiaxiang Li.