摘 要 ：对香港桃金娘科蒲桃属一新种，凹脉赤楠Syzygium impressum N. H. Xia, Y. F. Deng & K. L. Yip作了描述, 它与赤楠S. buxifolium Hook. & Arn.近似，区别在于叶倒卵形，中脉下凹，果直径约4 mm。
Abstract:A new species of Syzygium Gaertner (Myrtaceae), S. impressum N. H. Xia, Y. F. Deng & K. L. Yip, is described and illustrated. The new species is similar to S. buxifolium Hook. & Arn., but differs by its obovate leaves, conspicuously impressed midveins, and smaller fruit.