Also known as King Trumpet mushroom, French Horn mushroom, King Oyster mushroom, Boletus of the Steppes, and Trumpet RoyalePleurotaceaeNative to Mediterranean regions of Europe, the Middle East, and North Africa, but also grown in parts of AsiaThis is an edible and medicinal mushroom. Pleurotus eryngii is the largest species in the oyster mushroom genus, Pleurotus, and may naturally contain chemicals that stimulate the immune system.*San Francisco, California*Nozaki H, Itonori S, Sugita M, Nakamura K, Ohba K, Suzuki A, Kushi Y. (Aug 2008), "Mushroom acidic glycosphingolipid induction of cytokine secretion from murine T cells and proliferation of NK1.1 alpha/beta TCR-double positive cells in vitro", Biochem Biophys Res Commun. 373 (3): 4359