Syzygium kampotense is a new species from Cambodia. Syzygium cerasiforme, S. foxworthianum, and S. angkae and S. thorelii are new records from Cambodia, Vietnam and China, respectively. Syzygium prainianum subsp. minor and S. densinervium var. insulare are placed under S. prainianum and S. densinervium, respectively. Eugenia cochinchinensis, E. eburnea and E. ripicola, are reduced to synonymy under S. pellucidum. Lectotypes for Eugenia densiflora var. angustifolia, E. pellucida and E. pellucida var. contracta are designated.