Coriolus Versicolor is the most well researched mushroom in the world. Coriolus versicolor (formerly known as Trametes versicolor, Polyporus versicolor) is a mushroom that grows on tree trunks. In Japan it is known as kawaratake (“mushroom by the river bank”), and in China it is called Yun Zhi or “cloud fungus.” This mushroom, which has long been treasured in the Far East is now accepted worldwide for its effectiveness and safety of use. It has been more intensively researched around the world than any other mushroom species.