Russula integra    (L.) Fr. 

common name(s) : Nutty Brittlegill, Entire Russula 

New classification: Basidiomycota/Agaricomycotina/Agaricomycetes/Incertae sedis/Russulales/Russulaceae  
Former classification: Basidiomycota/Homobasidiomycetes/Agaricomycetideae/Russulales/Russulaceae  

synonyms: Russula polychroma, Russula integra-integra 

edibility : edible

potential confusions with Russula integra toxicity of Russula integra genus Russula  

The cap is brown to Bordeaux to chocolate; its margin is striate when mature. The cap surface is smooth, a bit viscid in wet weather.

The stem is white, without ring.

The flesh is white, unchanging; its taste is mild; the odour is not distinctive; its texture is grainy (breaking like a chalk stick).

The gills are yellow then ochre, free, crowded . The spore print is dark ochre. This species is mycorrhizal. It grows on the ground, in coniferous woods, on a rather calcareous soil, with fir and spruce.

The fruiting period takes place from June to November.
Dimensions: width of cap approximately 9 cm (between 4 and 15 cm)
  height of stem approximately 8 cm (between 3 and 12 cm)
  thickness of stem (at largest section) approximately 20 mm (between 13 and 30 mm)

Chemical tests : flesh becoming orange pink when in contact with iron sulphate; faint reaction to Gaïac (more or less quick blue);.

Distinctive features : Variable colour, but never red, orange nor yellow; shiny cap surface; mild taste; under conifers in the mountains

Russula integra is quite rare and localised in the forest of Rambouillet, and is occasional, more generally speaking .
here should be the distribution map of Russula integra in the forest of Rambouillet
Above : distribution map of Russula integra in the forest of Rambouillet



page updated on 14/01/18