Fu ling has a few other common names, such as Indian buead, China root, Fu Ling Pi, tuckahoe, Fu Shen, hoelen, and so on. As a matter of fact, this is a white fungus on wood, in particular on the roots of Japanese red pine and masson pine in the Pinaceae family. Today it is wild or cultivated, mainly produced in Yunnan, Anhui, Hubei, Henan, Sichuan and other places in China. The species that grow in Yunnan, called Yun Ling, is better in quality. The common form of poria fungus is its sclerotium, most of which are in the shape of irregular chunk, sphere, compressiform, oblong, or oval. They are in different sizes, usually less than 10cm in the smaller ones and 20cm to 30cm, even larger, in bigger ones. Skin is grayish brown or dark brown, in the shape of shrinking tumor, white with slightly pin inside, and composed of numerous hyphae. Fruiting body looks like mushroom, 0.5 to 2mm in diameter. It has a special odor.