Selected species of the alpine ginger Roscoea in biodiversity hotspots of Asian mountains. Left: R. humeana, from the Hengduan Mountains. Top right: R. cautleoides, from the Hengduan Mountains. Lower right: R. purpurea, from the Himalayas. Photographs by Qing-Jun Li. See Zhao et al., pp. 215–224 in this issue.