Agaricus campestris    L.:Fr. 

common name(s) : Field Mushroom 

New classification: Basidiomycota/Agaricomycotina/Agaricomycetes/Agaricomycetidae/Agaricales/Agaricaceae  
Former classification: Basidiomycota/Homobasidiomycetes/Agaricomycetideae/Agaricales/Agaricaceae/Agariceae  

synonyms: Psalliota campestris, Agaricus campester 

edibility : edible, good

photo gallery of  Agaricus campestris
photo gallery of  Agaricus campestris potential confusions with  Agaricus campestris toxicity of Agaricus campestris genus Agaricus  

The cap is white to yellow cream, hemispherical then convex and finally expanded; its margin is thick and flaky, inrolled, sometimes with white veil remnants hanging. The cap surface is smooth, sometimes finely scaly at the centre with age, not viscid nor sticky.

The stem is white, rather short, quickly hollow, with a membranous ring, not double.

The flesh is white, turning slowly red above gills when exposed to air; its taste is mild; the odour is pleasant, fruity or mushroomy; its texture is fibrous.

The gills are pale pink, then bright pink then dark purple brown, free, crowded (nb of gills per 90° ~ 47 ). The spore print is brown. This species is saprophytic. It grows on the ground, in parks, gardens, meadows: manured and well irrigated soils.

The fruiting period takes place from April to December.
Dimensions: width of cap approximately 7 cm (between 2 and 15 cm)
  height of stem approximately 6 cm (between 3 and 10 cm)
  thickness of stem (at largest section) approximately 15 mm (between 8 and 25 mm)

Chemical tests : no reaction to Schaeffer's test.

Distinctive features : White cap, sometimes slightly scaly; fruity or mushroomy odour; thick stem, tapered and never bulbous; gills at first pale pink, never white; flesh slightly blushing pink above gills; odour of cultivated mushroom; simple and short-lived ring

Agaricus campestris is quite rare and localised in the forest of Rambouillet, and is frequent, more generally speaking .
here should be the distribution map of Agaricus campestris in the forest of Rambouillet
Above : distribution map of Agaricus campestris in the forest of Rambouillet

page updated on 14/01/18