Abstract
Six new species of Begonia, Begonia armykapii S.Julia & C.Y.Ling, Begonia baikoides S.Julia & C.Y.Ling, Begonia papulifolia S.Julia & C.Y.Ling, Begonia rubrobracteolata S.Julia & C.Y.Ling, Begonia tinjanii S.Julia and Begonia triangularis Kiew & C.Y.Ling, are described from the forest areas in central part of Sarawak. All species belong to the sect. Petermannia.