It is a vine plant of the Acacia genus in the legume family, also known as red beans, chicken mother pearls, beauty beans, Acacia beans, red pearl wood, etc. It is widely distributed in tropical regions and is commonly found in shrubs near the coast. The stem of the acacia bean is thin and weak, with many branches and pinnate compound leaves; Leaves 8-13 pairs, membranous, opposite, nearly oblong. Racemes axillary, 3-8 cm long; The inflorescence axis is thick and short; The flowers are small and dense in a head shape; Calyx bell shaped, calyx teeth 4-lobed, covered with white rough hairs; The corolla is purple, the petal stem is triangular, and the wing and keel petals are relatively narrow. The pods are round in shape, with leathery petals that crack at maturity and 2-6 seeds; The seeds are oval shaped, smooth and glossy, with about two-thirds of the upper part being bright red and one-third of the lower part being black.