Flowers of Big-Leaved Acacia - Acacia mangium

''Acacia mangium'' is a species of flowering tree in the pea family, Fabaceae, that is native to northeastern Queensland in Australia, the Western Province of Papua New Guinea, Papua, and the eastern Maluku Islands. Common names include black wattle, hickory wattle, mangium, and forest mangrove. Its uses include environmental management and wood.

It was first described in 1806 by Carl Ludwig Willdenow, who described it as living in the Moluccas.