Nicola Macpherson picks a shiitake mushroom

February 7, 2012 | 7:56 p.m. CST
Nicola Macpherson grabs a shiitake mushroom out of an oak log inside the greenhouse at Ozark Forest Mushrooms in the Big Springs region of the Ozarks on Jan. 22. The greenhouse is kept at 80 percent humidity to further help the mushrooms in their development.