Poria cocos for the fungus Poria cocos Wolfiporia cocos (Schw.) Ryv.&Gibn parasitic in the horsetail pine, yellow pine, red pine, Yunnan pine, black pine and other species of inter-root formation of dry mycorrhizal fungi. The outer skin of the fungus kernel is medicinally called "Poria"; the middle part holding the pine root is medicinally called "Poria"; between Poria and Poria, some near the outer skin of the part was reddish, medicinally called "Poria"; Poria and Poria, some near the outer skin is reddish, medicinally called "Poria"; Poria and Poria, some near the outer skin is reddish. "; between Poria and Poria and the white part of Poria, medicinally known as "white Poria", white Poria is usually cut into pieces or slices for drinking tablets, cut into small pieces of white Poria that is Poria Ding.