Rubroboletus satanas

Satan's Bolete Foraging & Identification Guide

Satan's Bolete is a massive, strikingly beautiful but highly toxic species of the bolete family, native to broadleaf forests in Europe. Growing in mycorrhizal association with oak and beech trees, it features a heavy, silver-gray cap, blood-red tube pores, and a thick red-netted bulbous stem. Famously named after the devil due to its severe toxicity, raw ingestion triggers violent, persistent vomiting, making it a key safety subject.

Environment Broadleaf Oak Woods

Humidity Moderate Humidity (60-70%)

Substrate / Host Calcareous Soil / Oak Root Symbiosis

Size 10cm - 30cm

Category Highly Toxic 💀

Botanical macro photography of Satan's Bolete (Rubroboletus satanas) - Plant AI care database

How to Identify Satan's Bolete

A heavy silvery-gray cap, blood-red tube pores underneath, and a bulbous red-netted stem that turns blue when cut.

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Cap: Varies by species.
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Spore: Critical check.

💡 Plant AI Tip: ⚠️ Toxicity Warning: Extremely toxic when raw, causing severe, prolonged vomiting and abdominal pain. Even cooked specimens can trigger severe gastrointestinal poisoning.

Detailed Mycology Profile & Foraging Guide

Follow our detailed scientific field guide and environmental parameters to identify and study Satan's Bolete safely.

Forms strict mycorrhizal relationships with deciduous hardwood trees, particularly Oak and Beech. It grows exclusively on chalky, calcareous soils in warm hardwood forests.

Requires warm, humid summer and early autumn weather. Pinning is highly stimulated by warm summer storms.

Thrives in partial shade near forest edges. Light helps develop the bright carmine-red pigment on the lower stem.

No gills. The cap is large, 10 to 30 cm, silvery-gray. Underside is covered in tiny, crowded, dark orange-to-blood-red pores.

Produces an olive-brown spore print. Spores disperse via forest wind, inoculating hardwood roots.

Flesh is thick, firm, pale yellow, staining slowly pale blue when cut. Stem is massive, bulbous, red-netted, completely lacking a ring or volva.

NEVER harvest. Avoid gathering any boletes showing red pores and red stems, as they represent the most toxic members of the Boletus family.

Highly toxic and inedible. Raw ingestion causes severe, violent vomiting that can last for hours. Cooking does not fully eliminate the toxins.

Contains a highly toxic glycoprotein called bolesatine, a ribosome-inactivating protein that blocks protein synthesis and causes severe gastrointestinal necrosis.

CRITICAL WARNING: Often confused with the edible Porcini (Boletus edulis) or the Bicolored Bolete (Baorangia bicolor). Porcini has white-to-yellow pores and a white stem, whereas Satan's Bolete has blood-red pores, a carmine-red stem, and a silvery-gray cap. Always check pore color!

Satan's Bolete is easily identified by its extremely thick, heavy bulbous red stem and silver cap. The slow, pale-blue staining reaction of its cut flesh is a vital field identification key.

Common Look-alikes & Foraging Danger

Fading Pores

Symptoms: The bright blood-red pores turn dull yellow-brown in old specimens.

Action: Do not trust old specimens. Bolete pores naturally darken and fade to yellow-brown as they decay. Always check the cap color and the red netted stem base.

Blue Staining Fading

Symptoms: The blue-staining reaction of cut flesh turns faint, slow, or disappears in dry weather.

Action: This is natural. Dry drafts can slow down the enzymatic oxidation of boletes. Mist the cut surface slightly to see the blue color emerge.

Frequently Asked Questions

Why is it called 'Satan's Bolete'?

It is named 'Satan's Bolete' due to its devilish appearance (blood-red pores and stem contrast against a ghostly white cap) and its severe, agonizing gastrointestinal toxicity.

Is Satan's Bolete fatal if eaten?

Fatalities are extremely rare in healthy adults, as bolesatine is a gastrointestinal toxin rather than a liver cytotoxin. However, it causes exceptionally violent vomiting, severe dehydration, and extreme abdominal pain.

Does it have a bad smell?

Young specimens have a mild, pleasant earthy smell. However, as Satan's Bolete matures, it develops a highly unpleasant, nauseating odor resembling rotting organic matter.

How do you distinguish it from the Bicolored Bolete?

The edible Bicolored Bolete (Baorangia bicolor) has a bright rosy-red cap, bright yellow pores, and a slender yellow-red stem, whereas Satan's Bolete has a ghostly silver-gray cap, blood-red pores, and a thick bulbous red stem.