Lion's mane, also known as yamabushitake in Japan and hau tau gu in China, is an edible and medicinal mushroom that has been used by Eastern cultures for thousands of years. It also has a history in the western hemisphere, where Native American tribes were known to apply it directly to wounds to relieve pain. It grows on dying or dead hardwood trees throughout the northern hemisphere, and can be enjoyed raw, cooked, as a tea, or even in supplement form.