Agaricus bitorquis    (Quél) Sacc. 

common name(s) : Pavement Mushroom 

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

synonyms: Agaricus edulis, Agaricus campestris-bitorquis, Psalliota rodmanii, Psalliota bitorquis, Psalliota edulis 

edibility : edible, good

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

The cap is white to grey-white with an ochraceous tinge. The cap surface is smooth, not viscid nor sticky.

The flesh is white, turning pink when exposed to air; the odour is pleasant, weak; its texture is fibrous.

The gills are pink then chocolate brown, free, crowded . The spore print is brown. This species is saprophytic. It grows on the ground.

The fruiting period takes place from May to November.
Dimensions: width of cap approximately 9 cm (between 3 and 15 cm)
  height of stem approximately 6 cm (between 2 and 12 cm)
  thickness of stem (at largest section) approximately 20 mm (between 10 and 35 mm)

Chemical tests : no reaction to Schaeffer's test.

Distinctive features : double ring (the lower thinner and volva-like); very tough flesh; fruiting body capable of disrupting asphalt when growing

Agaricus bitorquis is still unreported so far in the forest of Rambouillet, and is occasional, more generally speaking .



page updated on 14/01/18