Boletus luteocupreus    Bertéa & Estadès 



New classification: Basidiomycota/Agaricomycotina/Agaricomycetes/Agaricomycetidae/Boletales/Boletaceae  
Former classification: Basidiomycota/Homobasidiomycetes/Agaricomycetideae/Boletales/Boletaceae/Boletoideae [ section:Luridi sub-section:Luridini]  

synonyms: Imperator luteocupreus 

edibility : unknown edibility

potential confusions with  Boletus luteocupreus toxicity of Boletus luteocupreus genus Boletus  

The cap is orange-yellow at first, soon becoming red-orange, shiny, here and there with coppery shades, and turning blue when touched, fleshy, hemispherical then convex. The cap surface is slightly downy then smooth. The cap margin is overhanging.

The stem is short, cylindrical or thicker in its lower part. It is bright yellow towards the apex, but red wine-brown towards its base, and is covered with a thin reddish network throughout.

The flesh is bright yellow, but reddish at the base of stem, turning blue everywhere instantly when exposed to air; its taste is mild; the odour is faint, coppery;

The tubes are bright yellow to olivaceous, strongly turning blue when exposed to air.

The pores are thin, narrow, bright red to darker red, more orange towards the margin, turning instantly blackish blue-green when pressed.

It grows in deciduous woods or Mediterranean maquis, on a rather non calcareous soil, mostly with oaks.

The fruiting period takes place from July to November.
Dimensions: width of cap approximately 13 cm (between 5 and 20 cm)
  height of stem approximately 8 cm (between 5 and 12 cm)
  thickness of stem (at largest section) approximately 40 mm (between 15 and 60 mm)

Distinctive features : yellow to copper-red cap, smooth and shiny, turning blue when touched; yellow tubes; red pores, even in the youth, and turning blue when pressed; flesh becoming intensely green-blue when exposed to air; stem yellow at the top, reddish at the base, covered throughout with a fine red network

Boletus luteocupreus is still unreported so far in the forest of Rambouillet, and is infrequent, more generally speaking .



page updated on 14/01/18