Phellinus gilvus
Phellinus gilvus
Phellinus gilvus
Phellinus gilvus
Phellinus gilvus
Phellinus gilvus
Phellinus gilvus
Phellinus gilvus
Phellinus gilvus
Cap margin yellow, lightening with age; pore surface purple-brown, darkening with age.  Flesh
cork-like; often orange-brown.  
Phellinus gilvus is a pathogen of oak trees, causing white rot.  
Order Hymenochaetales.
See Phellinus gilvus at
Fungi Growing on Wood

Also described at
MushroomExpert.Com
See Macrofungi Associated with Oaks of
Eastern North America
(2008), D.E.
Binion, et al., p. 297.