Cortex Lycii. Part used: Bark of Root. Know as Wolfberry Root Cortex or Lyceum. Entering meridians: lung, liver and kidney. Used to cool the blood and drain Yin deficiency fire to aid sweats, steaming bone disorder, tuberculosis, irritability and thirst. Also clears and drains heat in the lung and cools the blood. All Phoenix Medical dry authentic herbs and concentrated herbal granules are free of sulphur, herbicides and pesticides.