Lumpy bracket

Trametes gibbosa is typically 5 to 20 cm across and roughly semicircular when growing as brackets but more or less circular when growing as a fan on the top of a stump. It has leathery flesh and is white or brownish often with a pinkish tinge near to the rim. Brackets vary greatly in thickness but are usually between 1 and 6 cm thick. The margins are rounded in young specimens, which are downy on the upper surface, but as fruitbodies age so the upper surface usually becomes coated with green algae and loses its down, while the margins become more acute. The tubes are white to light grey, 3 to 15 mm deep and spaced 0.5-1 mm apart, terminating in irregular, elongated and maze-like pores that are cream at first and turn ochre with age.