Powdery brittlegill. A variety of wild mushroom, ranging in colour from blue to light green or grey. Most brittlegills resemble other ones that are inedible and some will cause gastric problems. You can normally detect what type it is by the flavour. A tiny tasting will immediately reveal whether or not it is edible, but it is worth spitting it out immediately if you detect a bitter taste.
Brown beech mushroom. The true shimeji mushroom. which, in nature, grows on wood, often beech as its name implies.