False morel: why this spring mushroom is dangerous

In spring, as soon as the snow melts, the first mushrooms appear in pine forests — morels and false morels. They look alike, but the false morel contains a dangerous poison, so it calls for special attention. Let's look at how to recognize it, how it differs from a morel and why it's not worth the risk.

What a false morel looks like

Features of the false morel (Gyromitra esculenta):

• Cap shapeless and wrinkled, like a walnut or a brain, dark brown or reddish brown.
• Folds chaotic and irregular, fused to the stem in places.
• Stem short, thick, white or pinkish, often hidden in the leaf litter.

It's the chaotic, brain-like cap that sets the false morel apart from a morel.

How a false morel differs from a morel

This matters most for your safety:

• the morel has a slender, conical or egg-shaped cap with regular honeycomb pits, and a clearly defined, hollow stem;
• the false morel has a shapeless, wrinkled, brain-like cap without regular pits.

For more on spring mushrooms, see our article when to pick morels and false morels.

Why the false morel is dangerous

The false morel contains the toxin gyromitrin, which damages the liver and nervous system and can cause severe, sometimes fatal poisoning. The treacherous part is that the amount of poison varies between mushrooms and locations, and the poison itself is unstable — it partly breaks down with drying and boiling. But relying on that is dangerous: there is no reliable "safe" way to prepare it.

That's why modern field guides advise not eating false morels at all. This is a case where the risk isn't worth the mushroom. For the most dangerous species, see our article deadly poisonous mushrooms of Ukraine.

Can you eat it

Although in some traditions false morels were once soaked and boiled, today they're classed as poisonous and are not recommended for picking to eat. And you must never eat a false morel raw — on the dangers of eating mushrooms raw, see our article which mushrooms can be eaten raw.

Sources

• "Vyznachnyk hrybiv Ukrainy" (Identification Guide to the Mushrooms of Ukraine; Kyiv, Naukova Dumka publishing house).
• Gyromitra esculenta in the GBIF database, the global biodiversity database.
• False morel on Wikipedia.