Bondarzewia berkeleyi (Fr.) Bond. et Singer syn. Polyporus berkeleyi Fr.Berkeley's Polypore Fruit body annual. Cap up to 25cm across, 15cm wide, 3cm thick, one or several overlapping in large clusters, usually fan-shaped; tan to yellowish; smooth, finely felty or rough and pitted. Tubes up to 2cm deep, decurrent, continuous with the flesh; pale buff. Pores1-2 per mm, circular to angular; surface tan. Stem up to 8cm thick, lateral, usually branched, developing from an underground sclerotium; yellowish. Flesh up to 3cm thick, corky; pale bull. Spores globose to subglobose, ornamented with short irregularly arranged amyloid ridges, 7-9 x 6-8µ. Deposit ochraceous. Hyphal structure dimitic. Habitat growing from the base or stumps of hardwood and deciduous trees, particularly oak and chestnut. Found in eastern North America, west to Texas and Louisiana. Season July-October. Edible with caution.