Oyster Mushroom Taken at St Andrews on 26th June 2023 using Panasonic Lumix TZ70 in macro mode. Oyster Mushroom. Species: Order: Family: A.K.A. Pleurotus ostreatus. Agaricales. Pleurotaceae. Pearl Oyster. Habitat: Cap Diameter: Season: Edibility: Feature: Mainly on dead hardwood trees. 2 - 30 cms. In the U.K. all year round The oyster mushroom is a prizes edible mushroom, and is a delicacy in Japanese, Korean and Chinese cuisine. It is frequently served on its own, in soups, stuffed, or in stir-fry recipes with soy sauce. Oyster mushrooms may be used in sauces, such as oyster sauce. One of the few known carnivorous mushrooms. It's root system can kill and digest ringworms. When picking any fungus for consumption, caution should be exercised at all times.