Tricholoma mutabile is a mushroom of the agaric genus Tricholoma. Found in Yuba County, California, it was first described scientifically in 1996. It has a grayish convex cap that is wide, a white stalk measuring long by thick. The white gills are sinuate, and turn pale golden brown in maturity. See also List of North American Tricholoma List of Tricholoma species References mutabile Fungi described in 1996 Fungi of North America