The bitter pecan (Carya aquatica) belongs to Juglandaceae (the Walnut family). It is a tall deciduous tree that is native to the southeastern United Stalts. This tree grows in bottomlands and swamps, and up to a height of 20-30 m. The bark is gray or brownish, exfoliating into long strips or broad plates. The leaves are odd-pinnate compound with 9-11 ovate-lanceolate leaflets. The staminate catkins are pedunculate, to 21 cm. The fruits are brown, bronze, or black, obovoid and compressed. The nuts are chocolate brown, broadly obovoid, compressed, and 2-angled.