Lingzhi, Ganoderma lingzhi, also known as reishi, is a polypore fungus native to East Asia belonging to the genus Ganoderma.
Its reddish brown varnished kidney-shaped cap with bands and peripherally inserted stem gives it a distinct fan-like appearance. When fresh, the lingzhi is soft, cork-like, and flat. It lacks gills on its underside, and instead releases its spores via fine pores (80–120 μm) in yellow colors.
The lingzhi mushroom is used in traditional Chinese medicine. There is insufficient evidence to indicate that consuming lingzhi mushrooms or their extracts has any effect on human health or diseases.
In nature, it grows at the base and stumps of deciduous trees, especially that of the maple.