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Deadly☠️ To avoid

🍄 False Morel

Gyromitra esculenta · Discinaceae

🌳 Temperate Europe🌲 Boreal🍁 North America
🧠 To remember it“Wrinkled brain, never pitted” — slice it in half: true morels are hollow and clean, false morels are filled and contorted.
False Morel — Gyromitra esculenta

🔍 Identify it without mistakes

A spring mushroom with a deeply folded, brain-like reddish-brown cap, often mistaken for a true morel by hasty spring foragers. Its species name "esculenta" (edible) is misleading and outdated: the gyromitrin it contains hydrolyzes in the body into monomethylhydrazine, a compound closely related to certain rocket fuels. It is still consumed traditionally in a few Scandinavian countries only after strict preparation, which does not entirely eliminate the risk.

  1. reddish-brown to chocolate-brown cap, irregularly folded and convoluted like a brain, NEVER with regular honeycomb pits like a true morel
  2. hollow cap but NOT clearly separated from the stem (unlike true morels whose cap detaches cleanly)
  3. whitish stem, often irregular and hollow
  4. grows in spring, often under conifers in sandy soil
Sizecap 3-10 cm, stem 3-6 cm
Floweringspring
Habitatconiferous forests, sandy soils, often after fires or logging

⚠️ Not to be confused with

Yellow Morel / True Morel (Morchella esculenta)none for the morel, classic and well-documented confusion every spring

To tell them apart: CUT THE MUSHROOM IN HALF lengthwise: the true morel has a completely hollow cap clearly attached to the stem with regular honeycomb pits; the false morel has an irregularly folded, brain-like cap, never with distinct pits, and is often partially filled with internal tissue

☠️ What kills

nomGyromitrin, hydrolyzed in the body into monomethylhydrazine (MMH)
dose letale estimeehighly variable depending on preparation (MMH is volatile and partially removed by prolonged boiling with steam vent, but never completely); fatal cases are documented even after traditional cooking (approx)
delai6 to 12 h
symptomesvomiting, diarrhea, abdominal pain, followed in severe cases by liver damage, neurological disorders (seizures), and in rare cases severe hemolysis
antidotehigh doses of pyridoxine (vitamin B6) are used in intensive care to counteract seizures linked to monomethylhydrazine, similar to the treatment for hydrazine poisoning
morts documenteesyes — false morels are responsible for documented deaths in Europe and North America, including among experienced consumers who prepared them using traditional Scandinavian methods

First steps : Call poison control immediately if ingested, even after cooking: the risk is never fully eliminated by traditional preparation. Do not induce vomiting. Never cook false morels inside an enclosed living space, as the cooking vapors are themselves toxic if inhaled.

Sources (3)

No entry replaces a certain identification in the field, or medical advice. When in doubt: don't eat it. If ingestion is suspected: poison control or 112/911.