Kostermanthus is a genus of plant in the family Chrysobalanaceae described as a genus in 1979. Kostermanthus is native to Southeast Asia (Peninsular Malaysia, Borneo, Sumatra, Sulawesi, and the Philippines). It is named in honor of André Joseph Guillaume Henri Kostermans (1906-1994), an Indonesian botanist of Dutch ancestry. Species 1. \n* Kostermanthus heteropetalus (Scort. ex King) Prance - Peninsular Malaysia, Borneo, Sumatra, Sulawesi, Philippines 2. \n* Kostermanthus malayanus (Kosterm.) Prance - Perak 3. \n* Kostermanthus robustus Prance - Sarawak