Source: The sclerotia of Poria cocos fungus. Latin botanical name: Poria cocos(Schw.) Wolf.[Pavhyma cocos Fr.] Harvesting and storage: Poria are usually mature 8-10 months after planting. The maturity sign is that the tortoise cracks appear again in Lingchang. The skin of the sclerotium is yellowish-brown in color and no white cracks appear, and it can be harvested. Choose a sunny day to dig out the mud and sand, pile it up indoors and cover the straw to sweat. When the moisture dries up, the ling skin is wrinkled and then peeled off and dried.