Based on detailed morphological comparisons and literature examinations, it was found that the two species, Glochidion acuminatum Müll. Arg. and G. triandrum (Blanco) C. B. Rob. (Phyllanthaceae), can be readily distinguished from one other and warrant acceptance as separate species. Here, their morphological circumscription and geographical distribution are reevaluated. In addition, the three names, viz. G. acuminatum, G. eleutherostylum Müll. Arg. and G. quinquestylum Elmer, are lectotyped and the name G. triandrum is neotyped.