Death cap vs meadow mushroom: white gills and a cup mean danger

Quick answer

Gills that stay white, a white spore print and a white sac-like cup around a bulb at the stem base, often buried, mark the death cap; the meadow mushroom's gills are bright pink when young and chocolate brown later, its print is chocolate brown, and it has no cup. Pale death caps can be nearly white on top, so cap color alone does not rule one out.

Deadly lookalike

The death cap is deadly.

Unlike the meadow mushroom, the death cap (Amanita phalloides) contains amatoxins, which halt protein production in cells by binding the enzyme RNA polymerase II. The CDC describes a delay of 6 to 24 hours before vomiting and diarrhea begin, an apparent recovery 24 to 36 hours after the meal, and liver and multiorgan failure typically 3 to 5 days after it. Amatoxins are heat stable and are not inactivated by cooking. In the 2016 northern California outbreak, three of 14 patients needed liver transplants.

If someone has eaten a wild mushroom and feels unwell, or may have eaten one of these, call poison control now: 1-800-222-1222 in the US. Do not wait for symptoms.

Side by side

The tell for each

A death cap with a pale olive-green cap, a white skirt on the stem and a cup at the base, among dead leaves
Deadly
Death CapAmanita phalloides

The tellGreenish to yellow-olive cap, white gills, a skirt-like ring, and a white sac-like cup around the base of the stem.

Two white meadow mushrooms in grass, one turned over to show pink gills and a short stem
Edible
Meadow MushroomAgaricus campestris

The tellWhite cap on a short stem, with bright pink gills that turn chocolate brown, growing in grass.

How they differ

Differences between the death cap and the meadow mushroom
FeatureDeath CapMeadow Mushroom
GillsDeath CapWhite, staying white.Meadow MushroomBright pink when young, then chocolate brown to blackish brown.
Spore printDeath CapWhite.Meadow MushroomChocolate brown to blackish brown.
Stem baseDeath CapA rounded bulb in a white, membranous sac-like cup.Meadow MushroomNo bulb and no cup.
Cap colorDeath CapYellow-green to olive or bronze, sometimes pale or nearly white.Meadow MushroomWhite to grayish white.
RingDeath CapA thin, white, skirt-like ring that can tear away.Meadow MushroomA thin, fragile ring that often disappears.
HabitatDeath CapUnder oaks and planted trees; in cities, sometimes in irrigated lawns near host trees.Meadow MushroomOpen lawns, pastures, meadows and golf courses.

FAQ

Common questions

Can death caps grow in lawns?

Yes. They grow in irrigated lawns and grass strips near host trees, with the cup hidden below ground.

Are death caps always green?

No. Caps are usually yellow-green to olive or bronze, but some are pale or nearly white. White gills, a white print and the cup are more reliable than cap color.

Sources

Where these facts come from

  1. Amanita phalloides

    MushroomExpert.com

  2. Agaricus campestris

    MushroomExpert.com

  3. Amanita phalloides, death cap (Mushrooms Up!)

    Beaty Biodiversity Museum, University of British Columbia

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