Caulis Polygoni Multiflori. Part used: Stem. Known as Polygonum Vine. Entering meridians: Heart and Liver. Ye Jiao Teng nourishes the heart Yin and blood, calms the Spirit, unblocks channels and dispels wind-dampness, alleviates itching and astringes sweat. All Phoenix Medical dry authentic herbs and concentrated herbal granules are free of sulphur, herbicides and pesticides.