Found on unused footpath

Found on unused footpath

Observation - Found on unused footpath - UK and Ireland. Description: This crustose lichen is found in abundance in this area - most patches are bleached white (sulphur dioxide?) but there are some lichen which are slightly greener.

This crustose lichen is found in abundance in this area - most patches are bleached white (sulphur dioxide?) but there are some lichen which are slightly greener.