Russula sororia    Fr. 

common name(s) : Sepia Brittlegill 

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

edibility : inedible

photo gallery of  Russula sororia
photo gallery of  Russula sororia potential confusions with  Russula sororia toxicity of Russula sororia genus Russula  

The cap is brownish grey to sepia-brown or tawny-brown; its margin is strongly striate. The cap surface is smooth, viscid in wet weather.

The stem is whitish, without ring.

The flesh is unchanging; its taste is oily or of spice; the odour is like fresh camembert cheese, or cooked artichoke or rancid; its texture is grainy (breaking like a chalk stick).

The gills are greyish-white, free, distant . The spore print is pale cream. This species is mycorrhizal. It grows on the ground, in broad-leaved and coniferous woods, on a rather sandy soil, with oak.

The fruiting period takes place from July to November.
Dimensions: width of cap approximately 6 cm (between 3 and 12 cm)
  height of stem approximately 5 cm (between 3 and 6 cm)
  thickness of stem (at largest section) approximately 15 mm (between 10 and 25 mm)

Chemical tests : flesh becoming salmon pink when in contact with iron sulphate; faint purple reaction of cap cystidia to sulpho-vanillin; stem becoming pale pink with formalin.

Distinctive features : Grey-brown cap, darker in the centre, viscid when damp and with a grooved margin; white gills, with a tinge of grey, and an odour of cheese (camembert); oily then acrid taste

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



page updated on 14/01/18