Dictydiaethalium plumbeum

Description

Looks like a paler version of Tubifera ferruginosa but the sporangia are indistinct. 

Links:

• Index Fungorum: 119378
• 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