Rhus sandwicensis, commonly known as neneleau, neleau or Hawaiian sumac, is a species of flowering plant in the cashew family, Anacardiaceae, that is endemic to Hawaii. It is small tree, reaching a height of 4.5–7.5 m (15–25 ft) and a trunk diameter of 10–30 cm (3.9–11.8 in). Neneleau inhabits dry, coastal mesic, mixed mesic and wet forests at elevations of 180–610 m (590–2,000 ft) on all main islands.