Cortinarius orellanus, commonly known as the fool's webcap or fools webcap, is a species of deadly fungus in the family Cortinariaceae native to Europe. Within the genus it belongs to a group known as the Orellani, all of which are highly toxic—eating them results in kidney failure, which is often irreversible. The mushroom is generally tan to brown all over.

The danger of C. orellanus was uncovered in 1957, after (in 1952) 102 people fell ill after eating it in Bydgoszcz, Poland. Eleven of the victims died. Since then, cases of poisoning have been recorded in France, Switzerland, and Germany. In 1997, four people suffered renal toxicity after mistaking C. orellanus for the edible and prized chanterelle in Austria, where wild mushroom picking is popular.

Boletus edulis (English: cep, penny bun, porcino or porcini) is a basidiomycete fungus, and the type species of the genus Boletus. Prized as an ingredient in various culinary dishes, B. edulis is an edible mushroom held in high regard in many cuisines, and is commonly prepared and eaten in soups, pasta, or risotto.

Pleurotus ostreatus, the oyster mushroom or oyster fungus, is a common edible mushroom. It was first cultivated in Germany as a subsistence measure during World War I and is now grown commercially around the world for food.

Agaricus bisporus (known as common mushroom, white mushroom, button mushroom, etc.) is an edible basidiomycete mushroom native to grasslands in Europe and North America.

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