A new species of the genus Hancea Seem. is described from the forested region of eastern Madagascar. It can be readily distinguished from the three species previously recognized on the island by the shape of its leaf apex and by its lack of domatia in the axils of the leaf veins. A key to the species of the genus in Madagascar is presented.
Euphorbiaceae, Acalyphoideae, Hancea, Mallotus, Deuteromallotus, Madagascar, new species