Lepiota cristata. The dapper little fellow who stinks. Well, the odor is variable. This one smelled vaguely of garlic. It's a small mushroom with a smooth white stalk, a delicate ring, and free gills. Like other Lepiotas, the cap is scaly. The scales are somewhat concentrically arranged around a central bump, which is usually bald. The spore print is white, and the spores are bullet shaped. They were around 7 μm long. Numerous websites and guidebooks list this as possibly poisonous, but I've yet to find anyone who says it is definitively poisonous. It prefers disturbed habitats, but this one was found in the woods. I found some earlier in the day growing in a sandbar of a creek.