From the picture, this is Ganoderma lucidum, which is mainly distributed in the east and south of China. There are many kinds of Ganoderma lucidum, and its value and efficacy are different because of different kinds of Ganoderma lucidum, among which the best is Ganoderma lucidum, followed by Ganoderma lucidum.

Morphology of Ganoderma lucidum: the mushroom cap is kidney-shaped, semi-circular or nearly round, with a diameter of 10~ 18cm and a thickness of 1~2cm. The mushroom cap: the shell is hard, yellow-brown to reddish-brown, shiny, with annular ribs and radial wrinkles, and the edge is thin and flat, often slightly covered with white to light brown meat; Spores are fine, yellow-brown stipe: cylindrical, lateral, less partial, 7~ 15cm long and 1~3 in diameter. 5cm, reddish brown to purple brown, bright smell: slightly fragrant, bitter.

　

Characteristics of Ganoderma lucidum: the leather shell is purple-black with lacquer-like luster; The mushroom meat is rusty brown. Characteristics of cultivated Ganoderma lucidum with stipe length 17~23cm: The fruiting body is thick and plump, with a diameter of 12~22cm.