Peniophora cinerea

Description

Found on black walnut branches. This is a plant pathogen species. 

Links:

• Index Fungorum: 231569
• Mushroom Expert
• Mushroom Observer
• Wikipedia
• Google Image Search:

Observations:

• Mushroom Observer Pennsylvania Distribution
• MycoPortal Pennsylvania vouchers
• iNaturalist Pennsylvania Observations

 All images copyright of the photographer listed in the caption. 

Additional information