This paper includes descriptions of new taxa that will be treated in Flora Malesiana, as well as comments on the distribution, morphology, or nomenclature of some of the other species. In all, 15 species, belonging to six sections, are recognised as natives of the Flora area, in addition to the introduced H. monogynum L. ( (H. chinense L.), which has long been cultivated there. The affinities, both systematic and geographical, of the Malesian species are very varied and pose some interesting problems of phytogeography.