Rubroboletus satanas
Satan's bolete is a large, poisonous bolete with a pale grey-white cap, red pores and a bulbous red stem. The cap can exceed 30 cm. Its flesh turns blue when cut, old specimens smell unpleasant, and eating it causes violent gastroenteritis.
Fruits in summer and early autumn in warm broad-leaved and mixed woods, with oak and sweet chestnut, preferring chalky soils.
Widespread in the temperate zone but rare in most places, mainly in southern Europe; it has been recorded from the Black Sea and eastern Anatolia regions of Türkiye.
Identification suggestions (from the community or from AI) and the information here may be wrong; this app never confirms that anything is safe to eat. Do not consume wild plants, mushrooms or seafood without expert confirmation. Nothing here is medical advice.
It is arguably the largest bolete in Europe, with caps very rarely reaching 50 cm.
Poisonous. Especially raw or undercooked, it causes nausea, abdominal pain, violent vomiting and bloody diarrhoea that can last for hours. It is confused with ceps: the red stem, red pores and flesh that turns blue when cut give it away.
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No mushroom should be picked for eating based on this app or a photo. Deadly species look very like the ones foragers look for, and symptoms start hours later. If you suspect poisoning, call your local poison centre or emergency number right away (in Türkiye: 114).
Large greyish-white to buff, finely velvety cap
Pores yellow-orange at first, turning blood-red; blue instantly when touched
Bulbous stem with a red net — cep-type boletes never have a red stem
Flesh turns blue when cut; older specimens smell rotten
Poisonous