Styrax buchananii, recorded as endemic to Myanmar, has been known only in flower and S. chrysocarpus, endemic to China, only in fruit. Here we report the rediscovery of S. buchananii and S. chrysocarpus after ca. 100 and 70 years, respectively, since their publication. Both species were found in Yunnan Province, China. We also update the morphological descriptions of the two species to include fruit and floral characters, respectively, and provide a table of morphological characters that distinguish them from each other. A distribution map, photographs of living plants, and conservation assessment of each species are also provided.