It's been a wet, cool fall, a great season for fungi, and this is just the right time of year to spot oyster mushrooms, Pleurotus ostreatus. And you urban dwellers don't need to miss out, a walk around almost any well-treed neighborhood should result in success. Oyster mushrooms grow on wood and they are pretty easy to identify, especially given the season, and they are very tasty, very choice, highly recommended by many. The caps are asymmetrical and around here sort of a pale silvery gray color on top, white gills beneath, firmly fleshy. There were enough growing on the side of just this one maple tree to feed a lot of people.