Floral traits of Paraphlomis hsiwenii. A frontal view of flowers B dorsal view of flowers C lateral view of flowers D lateral view of calyces E frontal view of calyces F dissected calyx G dissected corolla and lateral view of corolla H lateral and frontal view of ovary I lateral view of nutlet. Scale bars: 2 mm (F); 4 mm (G); 500 μm (H) (A–C, G, H photographed by Jin-Fei Xiao D–F photographed by Ya-Ping Chen I photographed by Xiong Li).