Upuna is a monotypic genus of plants containing the single species Upuna borneensis. The genus name Upana is derived from its Iban name Upan. The species name borneensis refers to its distribution, being found only in Borneo (Brunei, Kalimantan, and East Malaysia). It is a heavy hardwood similar to Vatica. It is found in the Bako National Park, and has also been recorded from the Kubah National Park. Elsewhere it is threatened by habitat loss.