The Indigo Milk Cap (Lactarius indigo) is entirely blue to blue-gray, sometimes with greenish stains when old. When broken, it oozes indigo blue latex, which turns gradually greenish when exposed to air. It grows on the ground, typically in oak or pine woods. This mushroom has a broad geographic distribution, occurring throughout eastern North America and from Arizona to Mexico, but is most common along the Gulf Coast of the southeastern United States and in Mexico. It is generally considered edible, but reports vary regarding its desirability. (Lincoff 1981; Arora 1986, 1991; McNight and McNight 1987)
