Isotrema sanyaense R.T.Li, X.X.Zhu & Z.W.Wang, sp. nov. A flowering branch B leaf C flower (front view) D flower (lateral view) E opened flower (showing the inside structure) F anthers and gynostemium G fruit H seeds. Scale bars: 6 cm (B); 1 mm (C, D, E); 5 mm (F); 2 cm (G); 3 mm (H).