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Amanita phalloides

The deadliest mushroom on Earth doesn’t need to be rare, flashy or hard to mistake — it just needs to be eaten once.

Worth your time?4.5/5Yes.See the whole thing.What works, what does not, who it is for ↓
8:52in productionCh. 1 · Type of Death/ 8:52 · ceiling 15 min
4 chapters · 8:52Ceiling 15:00

The brief is written and checked. The video joins this page when it is cut.4 chapters · 1 min read · 8:52 planned

Read the brief

Amanita phalloides is a European fungus now found worldwide. It forms symbiotic relationships with broadleaved trees. It produces α-amanitin — a thermostable toxin that inhibits RNA polymerase II in humans, causing fatal organ failure. Its own RNA polymerase is resistant. It is responsible for 90% of annual mushroom-related deaths. Half a fruiting body is lethal. Its toxin is now used in targeted cancer therapies.

FungiDiseaseEvolutionEcologyDisease across the network →
Chapters & takeaways4
  1. 0:54
    Type of Death

    It is the deadliest mushroom known — and the defining species of all deadly Amanitas.

  2. 2:27
    Lethal Dose

    Half a cap kills. It causes 90% of global mushroom fatalities. Its toxin destroys liver and kidney function.

  3. 3:57
    How It Kills Without Killing Itself

    Its poison survives cooking. It blocks RNA synthesis in humans — but not in itself.

  4. 5:24
    From Poison to Payload

    α-Amanitin is both a fatal toxin and a precision cancer drug — because it targets RNA polymerase II with absolute specificity.

1 more chapterFewer chapters
Worth your time?

Yes. See the whole thing.

4.5/ 5
What works
  • ectomycorrhizal symbioses with broadleaved trees
  • RNA polymerase insensitivity to its own amatoxins
What does not
  • taste bitter
  • bruise blue
  • smell foul
  • change colour when cut or cooked
See it if
  • broadleaved trees
Skip it if
  • humans
  • foragers who cannot distinguish it from edible Amanita species
Who should see it, and who should skipHide who it is for
The written brief1 min read

What the species is and where it came from

Amanita phalloides is a basidiomycete fungus native to Europe. It is now globally introduced.

How it works, in terms someone would actually use

It delivers α-amanitin — a thermostable toxin — that halts RNA polymerase II in human cells. Cooking or freezing does not reduce its effect. Half a fruiting body kills an adult.

What it gets right

It establishes ectomycorrhizal symbioses with broadleaved trees. Its RNA polymerase is insensitive to its own amatoxins — so it avoids autotoxicity.

What it does not

It does not warn. It does not taste bitter. It does not bruise blue. It does not smell foul. It does not change colour when cut or cooked.

What it changed

It enabled oncological repurposing: α-amanitin is now used as a payload in antibody-drug conjugates targeting cancer cells, including multiple myeloma and solid tumours.

Who it is for, and who it is not

It is for broadleaved trees. It is not for humans. It is not for foragers who cannot distinguish it from edible Amanita species.

Is it worth your time

Yes, if you forage for mushrooms in Europe or any region where it has been introduced. No, if you do not handle wild fungi. It is not worth seeking out; it is worth avoiding.

Same habitat · Fungi4 of 24
7:59
Armillaria melleaArmillaria mellea is an edible, bioluminescent, pathogenic fungus that causes Armillaria root rot in hundreds of woody species — especially hardwoods — via black rhizomorphs in cool, moist temperate soils. Its mycelium glows during active growth due to inhibited hispidin synthesis. It shows no visible signs until infected trees display crown dieback, discoloured foliage and death.
9:22
Batrachochytrium dendrobatidisBatrachochytrium dendrobatidis is a chytrid fungus that causes chytridiomycosis in amphibians. It infects keratinized skin. It disrupts osmotic regulation. This leads to cardiac arrest. Its zoospores are motile, chemotactic, and travel one to two centimetres. It thrives between 4–25 °C. Growth halts above 28 °C. It is found worldwide—from lowland forests to cold mountain tops. It has devastated amphibian populations since its 1998 discovery. It contributed to extinctions in the Holocene extinction. Some amphibians resist infection via symbiosis with Janthinobacterium lividum. Surviving populations may reflect evolutionary selection. It also infects crayfish—but not mosquitofish.
10:42
Ophiocordyceps unilateralisOphiocordyceps unilateralis is a tropical rainforest fungus that infects carpenter ants, manipulates them to bite leaf veins at precise heights and microclimates, then kills them and sprouts fruiting bodies from their heads. Discovered by Alfred Russel Wallace in 1859, it operates within tight thermal and hygrometric bounds—and is frequently derailed by hyperparasites.
10:14
Destroying angelDestroying angel is a group of lethal, all-white Amanita species—A. virosa in Europe, A. bisporigera in eastern North America, A. ocreata in western North America—that form ectomycorrhizal relationships with trees. They contain amatoxins. Their most reliable field mark is the volva: a membranous universal veil that fully encloses the young fruit body like an egg. White stalks and free gills are consistent. The cap may be pure white or show yellowish, pinkish or tan tones at the centre. Mistaking them for edible species has caused fatal poisonings. No safe lookalike rule exists. Identification requires examining the volva—not just colour or habitat.
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