Photo: Diane Edwardson, May 5, 2011. A giant skull-like mushroom is growing midway between the Silver Lake Ave. Public Staircase & India St, at the base of a small Yucca. (Click on photo to enlarge.)
Wednesday, it looked more a brain, before the edges started curling up. It may be the same fungus that sprouted nearby, a year ago, which I originally mistook for discarded cantaloupe. According to MusroomExpert.com, it is some kind of "Puffball" mushroom.