Acacia is a plant of the genus Acacia in Leguminosae, which is native to tropical America and is now widely distributed in tropical areas. Acacia bark is rough, brown, multi-branched and has small lenticels; Stipules acicular, shorter on branchlets; Bipinnate compound leaves, bad leaf axis, gray-white pilose; Flowers are yellow and fragrant; Ovary terete, puberulent; Pods are swollen, nearly cylindrical, brown, hairless, hard or curved; There are many seeds, brown and oval.