Fungus?

Fungus?

Observation - Fungus? - UK and Ireland. Description: Not entirely sure if this is a fungus or a lichen. Very small, each 'head' approx 1mm in diameter, found growing on the end of a felled Silver Birch in a damp, salt marsh area. Hope someone can put a name to it, many thanks.

Not entirely sure if this is a fungus or a lichen. Very small, each 'head' approx 1mm in diameter, found growing on the end of a felled Silver Birch in a damp, salt marsh area. Hope someone can put a name to it, many thanks.