Tremella mesenterica (common names include yellow brain fungus, golden jelly fungus and Witch's butter) is a jelly fungus that is commonly found on rotting wood, especially gorse, as a parasite of wood decay fungi such as Stereum, Aleurodiscus and Peniophora. This fungus occurs widely in locations including North America, Australia, Japan and Taiwan. The species is not considered edible. This fungus is also known in Scotland as a Shot Star, the substance of a shooting star.
