Macro Mushroom - Agaricus crocodilinus

Alternative names
Agaricus urinascens
Description

A large, often massive mushroom. The cap is 8 to 30 cm, creamy white or with a slight ochre tint that splits to reveal woolly or scaly patches.  It slowly stains yellow when cut or bruised.  Smells initially of almonds but then unpleasantly of urine. Stem height 10 to 14 cm. This species has the largest spores of all Agaricus species.  Spore print is brown.

Similar Species

There are several similar species - the toxic Yellow Stainer and some inedible related species quickly turn yellow when cut or bruised.

Identification difficulty

microscopy/smell

Recording advice

We recommend that the record is verified from a specimen by an expert before submission to Natuespot

Habitat

Found in soil amongst grass in pastures and meadows.

When to see it

From early summer until autumn.

UK Status

Widespread but infrequent in Britain.

VC55 Status

Infrequent in Leicestershire and Rutland.

Leicestershire & Rutland Map

MAP KEY:

Yellow squares = NBN records (all known data)
Coloured circles = NatureSpot records: 2025+ | 2020-2024 | pre-2020

UK Map

Species profile

Common names
Macro Mushroom
Species group:
fungus
Kingdom:
Fungi
Order:
Agaricales
Family:
Agaricaceae
Records on NatureSpot:
6
First record:
20/11/2011 (Watson, Ashley)
Last record:
16/10/2019 (Nicholls, David)

Total records by month

% of records within its species group

10km squares with records

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