Russula ionochlora    Romagn. 

common name(s) : Oilslick Brittlegill 

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

synonyms: Russula grisea ss.Schäff., Russula grisea-ionochlora 

edibility : edible

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

The cap is roundel of grey blue to violet grey, and almond green at the centre, with a violaceous ring in between the two; sometimes mixture of blue and green, convex then flattened and a bit depressed; its margin is striate when dry or smooth. The cap surface is smooth, not viscid nor sticky.

The stem is white to lilac-pink or violet, without ring.

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

The gills are white to pale cream, adnexed to almost free, crowded (nb of gills per 90° ~ 36 ). The spore print is pale cream (B-C). This species is mycorrhizal. It grows on the ground, in broad-leaved woods, most of the time with beech, sometimes oak.

The fruiting period takes place from June to November.
Dimensions: width of cap approximately 6 cm (between 4 and 8 cm)
  height of stem approximately 5 cm (between 3 and 7 cm)
  thickness of stem (at largest section) approximately 15 mm (between 10 and 20 mm)

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

Distinctive features : two-toned cap, grey-blue at the rim and greenish at the centre; flesh with slightly hot taste in the youth, mild later; bruises and insect bites surrounded by reddish; flesh turning salmon pink when in contact with iron sulphate; with beech

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

page updated on 14/01/18