Rhizoma Atractylodis Macrocephalae. Part used: Rhizome. Known as White Atractylodis. Entering meridians: spleen and stomach. Bai Zhu tonifies the spleen, augments Qi, dries dampness, promotes water metabolism, stabilises the exterior, stops sweating and calms the fetus. All Phoenix Medical dry authentic herbs and concentrated herbal granules are free of sulphur, herbicides and pesticides.