Most serious mushroom poisonings are not caused by recklessness but by overconfidence: the forager is sure they know the species, and its poisonous look-alike ends up in the basket. The most dangerous pairs in Polish forests are the parasol mushroom and Amanitas, the man on horseback and its look-alikes, morels and the false morel, the devil’s bolete and other boletes, the penny bun and the bitter bolete, and honey fungus and its poisonous neighbours. Below we describe how they differ – but remember that you must never rely on a single feature, and every uncertain specimen should be checked by a mycologist.
Parasol mushroom or Amanita?
The parasol mushroom (Macrolepiota procera) is a large mushroom with a cap like an umbrella. The problem is that Amanitas grow in similar places: the death cap (Amanita phalloides) and the panther cap (Amanita pantherina).
What to check on the parasol mushroom:
- cap large, pale, covered with brown scales, with a darker bump in the centre,
- ring thick, double and movable, so you can slide it along the stem,
- stem tall and slender, with a brown, snakeskin pattern, swollen at the base but without a volva.
The death cap has a smooth, olive-greenish or whitish cap, a hanging, immovable ring, and at the base a bulb in a membranous, sac-like volva.
The panther cap has a brown cap with white spots (remnants of the veil), a smooth, immovable ring, and a bulb with a distinct, sharp rim.
Most mistakes happen with young, still closed fruiting bodies and when only the caps are picked. The rule: don’t pick young “drumsticks” or caps without a stem. Also beware of small “parasols”: the small Lepiota species can contain the same dangerous toxins as the death cap.
The man on horseback: a mushroom that changed its status
The man on horseback (Tricholoma equestre) was eagerly picked in Poland for generations, especially in pine forests on sandy soils. At the beginning of the 21st century, however, severe poisonings were described, including fatal ones, involving muscle breakdown (rhabdomyolysis). Some followed repeated consumption within a short time. Today it is considered a dangerous mushroom. Do not pick it.
On top of that, it is easily confused with the poisonous sulphur knight (Tricholoma sulphureum), which is sulphur yellow all over and has an unpleasant, “gassy” smell, and with the death cap, which has a yellowish-green cap but white gills, a ring and a volva.
Morel or false morel?
In spring, mushrooms with folded caps appear in the woods. The false morel (Gyromitra esculenta) contains gyromitrin, which the body turns into a highly toxic compound that damages the liver and the nervous system, among other organs. Poisonings can be fatal, and even the toxin vapours can be dangerous. Old beliefs that it can be “detoxified” are a dangerous myth.
| Feature | Morels | False morel |
|---|---|---|
| Cap | pits like a honeycomb, fairly regular | folded like a brain, irregular |
| Cross-section | hollow inside, a single chamber from cap to stem | irregular chambers, often with a cottony filling |
| Colour | grey-brown, yellowish, ochre | chestnut, dark brown, reddish-brown |
Most importantly: in Poland morels are protected species. They are not picked there but left in the forest – you can photograph them instead. The Bohemian false morel (Verpa bohemica) is protected too. So a spring “mushroom with a folded cap” should not end up in your basket at all.
Devil’s bolete or other boletes?
The devil’s bolete (Rubroboletus satanas) is a poisonous mushroom, rare and protected in Poland. It grows in warm deciduous forests, often on limestone.
Its features:
- cap whitish, greyish or pale olive,
- pores on the underside of the cap red,
- stem thick, bulbous, yellow-red, with a red network,
- the flesh may turn blue when cut, and older fruiting bodies smell unpleasant.
It is confused with other blue-staining boletes and with the scarletina bolete (Neoboletus luridiformis). For beginners the simplest safety rule is: don’t pick boletes with red or orange pores. The penny bun never has red pores.
Penny bun or bitter bolete?
The bitter bolete (Tylopilus felleus) is not one of the deadly poisonous mushrooms, but it is intensely bitter and has disappointed many a forager who was sure they had found a penny bun. In Polish folk tradition it is even called “the devil”.
| Feature | Penny bun (Boletus edulis) | Bitter bolete |
|---|---|---|
| Tubes | white, then yellowish, finally olive-greenish | white, clearly pinkish with age |
| Network on the stem | pale, delicate, mainly in the upper part | dark, brown, coarse and distinct |
| Cap | from light brown to dark brown | light to dark brown |
In very young bitter boletes the tubes may still be white, so check the network as well. We do not encourage tasting unknown mushrooms “with the tongue”.
Honey fungus or sulphur tuft and funeral bell?
Honey fungi grow in autumn in clusters on stumps, roots and at the base of trees. But poisonous mushrooms grow in the same places.
- Honey fungus has a honey-coloured or brownish cap with small scales, whitish or cream gills, a distinct ring on the stem and a white spore print.
- Sulphur tuft (Hypholoma fasciculare) has a sulphur-yellow cap, orange-tinged in the centre, greenish-yellow gills that turn olive to dark with age, and no distinct ring. It is poisonous.
- Funeral bell (Galerina marginata) is small and brown, with a thin ring and a rusty brown spore print. It contains the same amatoxins as the death cap, and it is deadly. It is confused with honey fungi and the sheathed woodtuft (Kuehneromyces mutabilis).
A cluster on a stump is not enough to call a mushroom honey fungus. What counts is the colour of the gills, the ring, the scales and the spore print. The final say belongs to a mycologist.
How not to be fooled by look-alikes
- Use a set of features, not a single one: cap, underside (gills, tubes), ring, stem base, habitat and substrate, all at once.
- Check the whole fruiting body. Twist mushrooms out with their base and look at it before they go into the basket.
- Avoid very young and very old ones. Very young fruiting bodies don’t show their identifying features yet, and old ones are losing them.
- Leave protected species in the forest. In many countries some species are protected. In Poland, for example, morels and the devil’s bolete are.
- Any doubts? Ask a mycologist. Many countries have mushroom inspection points or mycological societies. In Poland the sanitary stations assess mushrooms for free. More in our mushroom safety guide.
The Gribo app helps you learn the features and warns about look-alikes, but identification from a photo does not replace a mycologist. Whether a mushroom can be eaten is decided by a mycologist who examines the specimen in person.
If you suspect poisoning, call the emergency number (112 in the EU), keep the mushroom leftovers and take them to the hospital. Read more in our guide to mushroom poisoning and safety.
Frequently asked questions
How do I tell a parasol mushroom from an Amanita?
The parasol has a scaly cap, a thick ring that slides along the stem and a stem with a brown, snakeskin pattern, but no volva. Amanitas have a ring that does not move and a bulb at the base of the stem – inside a sac-like volva or with a rim. That is why you should always look at the whole fruiting body, including the base.
Is the man on horseback poisonous?
Today it is considered a dangerous mushroom. Severe poisonings, including fatal ones with muscle breakdown, have been described after eating it. Do not pick it.
What is the difference between a false morel and a morel?
A morel has a cap with fairly regular pits like a honeycomb and is hollow inside when cut. The false morel has a cap folded like a brain, and its cross-section shows irregular chambers. In Poland morels are protected, so they are not picked there anyway.
Where can I check whether a mushroom is poisonous?
With a mycologist – many countries have mushroom inspection points or mycological societies that check finds; in Poland the sanitary stations do it for free. An app and an atlas help you learn, but they do not replace an expert’s assessment of the specimen.
What should I do if I suspect mushroom poisoning?
Call the emergency number (112 in the EU), keep the mushroom leftovers and take them to the hospital. The doctors will decide on further treatment.