-7-12 cm wide, 6-8 cm deep, 1-2 cm thick
-Somewhat zonate, very course, fibrous surface of cap
-Pores angular, up to 6 per mm, glancing
-Flesh thin, up to 3 mm thick, brown and fibrous
-Spore print en mass is bright yellow, spores are 5×7um and yellow colored.
-On a very dead beech.