Boletus badius, also known as Bay Bolete, is a large bolete with bay-brown cap and lemon-yellow pores bruises distinctively bluish green. It grows in coniferous or mixed woods on the ground or on decaying tree stumps.

Cap chestnut to dark brown, sometimes with brick-red or ochre tinges; almost spherical in young specimens before broadening and flattening out. It is at first downy, becoming smooth and polished, somewhat sticky when damp. Flesh is white or lemon-yellow. Where cut, it becomes faintly blue. Pores are initially cream to pale yellow, but become greenish yellow or olive with age. Stem is similar in colour to the cap but paler, and sometimes with a rose-coloured tinge and relatively slim and cylindrical (compared to many other boletes). The mushroom has no ring.

Similar species Boletus edulis has a barrel-shaped stem with white net patterning.

Synonyms Synonyms of Boletus badius include Imleria badia, Ixocomus badius and Xerocomus badius.

Imleria badia on the First Nature Web site.
Boletus badius on the MushroomExpert.Com Web site.