ATH
Been here much more than a while
- Location
- Findlay, Ohio
I think @TCtreeswinger was answering @cory 's question about about maple limbs, not the OP's question about smooth patch on white oak with his Eutypella response...Looks to be the Aleurodiscus rather than Eutypa or Eutypella to me. Pronounciation is pretty phonetic.