The species of the tree genus Pterospermum Schreb. (Malvaceae: Dombeyoideae) in Malesia are revised. Twenty-six species of Pterospermum are recognised, six of which are new (P. aureum S.K.Ganesan, P. borneense S.K.Ganesan, P. glabrum S.K.Ganesan, P. havilandii S.K.Ganesan, P. merrillianum S.K.Ganesan and P. zollingerianum S.K.Ganesan) and one (P. grewiifolium Pierre) that is a new distributional record for Malesia. Identification keys are provided. All names are typified, and detailed descriptions of all species recognised are provided. Information on habitat, uses and conservation status is given for all species.