Lichen or fungus?

Lichen or fungus?

Observation - Lichen or fungus? - UK and Ireland. Description: Is this a fungus or a lichen? The photos are of areas very close together but taken a week apart. Whatever it is is growing on the top bar of a wooden gate.

Is this a fungus or a lichen? The photos are of areas very close together but taken a week apart. Whatever it is is growing on the top bar of a wooden gate.