Description: Albizia julibrissin, mimosa or silk tree is a member of the pea family mostly found in East Asia. . In China, both the bark He-huan-pi (pi means bark) and flowers He-huan-hua (hua means flowers) were adopted as herbal medicines at an early date. The bark appears in a Tang Dynasty work from the year 720. The flowers were first mentioned in a Song Dynasty work from the year 1116. In China the tree is called he-huan which means �enliven the spirit�.