A new species of Acanthaceae, Strobilanthes biocullata Y. F. Deng & J. R. I. Wood, from China, is described and illustrated. The species is found in Hunan, Guangxi, and Guangdong provinces, where it grows on rocks along streams. It clearly belongs to the group of species placed by Bremekamp in Semnostachya Bremek., but differs from all these by two swollen bulges on the dorsal surface of the long-acuminate bracts. Strobilanthes biocullata is the first Chinese species of Strobilanthes Blume reported to have a plietesial life history.