Mushrooms growing in root zone of ironwood trees
These images were taken on August 10, 2007 when many large mushrooms were observed sprouting over the roots of a row ironwood trees, Casuarina equesitifolia, on the University of Guam campus. Several trees in the row were dead or dying. However, These mushrooms were identified as belonging to genus Lepiota. Lepiota mushrooms are not parasitic. They are usually found growing on open ground, though sometimes can be found growing in extremely decayed wood (1).
1. Largent, David L. 1986. "HOW TO IDENTIFY MUSHROOMS TO GENUS I: Macroscopic Features." Mad River Press, Eureka, California.