Xerocomus pruinatus    (Fr.) Quél. 

common name(s) : Matt Bolete, Plum-fleshed Bolete 

New classification: Basidiomycota/Agaricomycotina/Agaricomycetes/Agaricomycetidae/Boletales/Boletaceae  
Former classification: Basidiomycota/Homobasidiomycetes/Agaricomycetideae/Boletales/Boletaceae  

synonyms: Xerocomellus pruinatus, Boletus pruinatus, Xerocomellus pruinatus 
(unconfirmed synonyms: Boletus fragilipes)  

edibility : edible

photo gallery of  Xerocomus pruinatus
photo gallery of  Xerocomus pruinatus potential confusions with  Xerocomus pruinatus toxicity of Xerocomus pruinatus genus Xerocomus  

The cap is dark, reddish brown to dark-brown or blackish brown, fleshy, of a convex then expanded shape. The cap surface is matt, dry and smooth, covered with a whitish bloom in the youth, soon destroyed upon handling. The surface is soon cracking when drying starting from the margin, revealing the pink flesh underneath.

The stem is bright lemon yellow at first, remaining so at the apex, becoming more or less covered with blood-reddish dots. It is cylindrical or tapering towards the base.

The flesh is thick, firm, bright lemon yellow then getting paler with age to chrome yellow, brownish at the stem base, turning blue slowly when cut, especially in the stem; its taste is mild, faint; the odour is faint or indistinct;

The tubes are short, adnate, bright yellow then olive-yellow, turning blue with age.

The pores are small, angular, bright yellow then olive-yellow, turning slowly blue when pressed. The spore print is olive-green to walnut-brown.

It grows in broad-leaved and coniferous woods, favouring beech.

The fruiting period takes place from July to November.
Dimensions: width of cap approximately 7 cm (between 3 and 12 cm)
  height of stem approximately 8 cm (between 3 and 10 cm)
  thickness of stem (at largest section) approximately 20 mm (between 10 and 30 mm)
  spores : 11,5-15,5 x 4,5-6 microns, spindle-shaped, thick-walled and without droplet, longitudinally striate

Distinctive features : dark cap, reddish brown to dark brown, smooth, covered with a whitish bloom when young; bright yellow pores, slowly turning blue when pressed; bright yellow stem, dotted with red at its base; bright yellow flesh

Xerocomus pruinatus is quite rare and scattered in the forest of Rambouillet, and is occasional, more generally speaking .
here should be the distribution map of Xerocomus pruinatus in the forest of Rambouillet
Above : distribution map of Xerocomus pruinatus in the forest of Rambouillet



page updated on 14/01/18