Cleistocalyx operculatus, also known as C. nervosum (DC.) Kosterm. , Eugenia operculata Roxb., 1832, Syzygium nervossum DC., 1828, Syzygium operculatum (Roxb.) Nied., 1893), is a medium-sized tree of about 10 meters in height with pale brown bark and dull green leaves. The tree is native to tropical Asia, extending as far north as Guangdong and Guangxi in China and as far south as the Northern Territory of Australia.