Borneodendron aenigmaticum is a plant species in the family Euphorbiaceae of the monotypic genus Borneodendron. Its name means "enigmatic Borneo-plant"; so-called because it is a monotypic taxon and is endemic to north Borneo (Sabah). The species is speacilised to Ultramafic soils and found within the Bidu Bidu forest reserve.