Dragon Superfoods Reishi powder guarantees excellent quality of one of the most popular mushrooms that has been an essential component in Eastern culture for centuries, with applications in traditional medicine for over 4000 years. Reishi (Ganoderma lucidum), known locally as Ling Zhi, is an edible fungi that grows above the ground in parts of Asia, including China, Korea and Japan. Reishi has a rather bitter woody taste and that is the reason why it is commonly used in powder or tincture form.