Albatrellus citrinus

Albatrellus citrinus is an uncommon, lemon-yellow mushroom-forming fungus species in the family Albatrellaceae, first described in 2003. Initially confused with the North American species Albatrellus subrubescens, this European fungus was distinguished through careful examination of its physical characteristics and DNA analysis. The mushroom forms fleshy, stool-like or bracket-shaped structures with caps measuring 5–15 centimetres across that start pale cream and develop yellow-orange hues with age, featuring small round pores on their undersides and mild-tasting white flesh that yellows when exposed to air. Primarily found in lime-rich soils under spruce trees in northern Europe, including Sweden and the Czech Republic, this fungus has also been discovered at high elevations in Tibet, where it maintains its ecological relationship with spruce trees in mountainous environments....read more on Wikipedia.