Pleurotus ostreatus    (Jacq.:Fr.) P. Kumm. 

common name(s) : Oyster Mushroom 

New classification: Basidiomycota/Agaricomycotina/Agaricomycetes/Agaricomycetidae/Agaricales/Pleurotaceae  
Former classification: Basidiomycota/Homobasidiomycetes/Agaricomycetideae/Tricholomatales/Pleurotaceae  

synonyms: Agaricus ostreatus 

edibility : edible, good

photo gallery of  Pleurotus ostreatus
photo gallery of  Pleurotus ostreatus potential confusions with  Pleurotus ostreatus toxicity of Pleurotus ostreatus genus Pleurotus  

The cap is flesh-grey, slate-grey to blue-grey, oval, oyster-shaped, convex then expanded, sometimes finally depressed; its margin is smooth, inrolled, then wavy or split. The cap surface is smooth, silky, shiny to matt.

The stem is lateral or off-centred, white, short or absent, without ring.

The flesh is white, unchanging; its taste is pleasant; the odour is pleasant, of mushroom; its texture is fibrous.

The gills are white then ochre-grey, decurrent, loosely crowded . The spore print is white. This species is saprophytic, sometimes parasitic. It grows on dead wood, in tufts, on dead (sometimes live) deciduous wood, on beech wood, sometimes also on other deciduous trees.

The fruiting period takes place from January to March.
Dimensions: width of cap approximately 12 cm (between 2 and 30 cm)
  height of stem approximately 3.5 cm (between 1 and 10 cm)
  thickness of stem (at largest section) approximately 20 mm (between 0 and 50 mm)

Chemical tests : none.

Distinctive features : grey to ochre-brown cap, with a lateral or off-centre stem, white, short or missing, and decurrent white gills; in dense tufts on deciduous wood; late in the season

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

page updated on 14/01/18