Notes on the Genus Sonneratia (Sonneratiaceae) in S. E. Asia

Sonneratia, a small genus of Sonneratiaceae, is widely distributed throughout SE. Asia, E. Africa and N. Australia, extending from 18?S. to 20?N. and from 45? to 150?E. In China it occurs only in the Hainan Island. In this paper, two new sections areproposed and six species are recognized, of which one is described as new.