Yellow Stainer - Agaricus xanthodermus


The cap is white and may have lobed edges. It is often smooth except for the centre which is usually slightly scaly. Cap width is 5 to 10 cm. The name derives from the fact that if the fungus is bruised or scratched a bright yellow stain will appear. A good test is to cut open the base of the stem and if it stains a strong yellow colour it is a likely to be Agaricus xanthodermus.

Identification difficulty

Grassland, parks etc and under broadleaved trees.

When to see it

Late summer to late autumn.

Life History

Although this species looks very similar to some edible mushrooms it is poisonous and should not be eaten.

UK Status

Fairly common and widespread in Britain.

VC55 Status

Fairly frequent in Leicestershire and Rutland.

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Leicestershire & Rutland Map


Yellow squares = NBN records (all known data)
Coloured circles = NatureSpot records: 2020+ | 2015-2019 | pre-2015

UK Map