Radix Asparagi. Part used: Tuber. Known as Asparagus Tuber. Entering meridians: Kidney and Lung. Tian Men Dong nourishes kidney Yin, clears lung heat, sedates fire, moistens the lungs, nourishes the kidneys, generates fluids and resolves phlegm. All Phoenix Medical dry authentic herbs and concentrated herbal granules are free of sulphur, herbicides and pesticides.