Caloplaca maritima?

Caloplaca maritima?

Observation - Caloplaca maritima? - UK and Ireland. Description: Found on large sea defence boulders. Any comments will be much appreciated - thanks. Each 'head' approx 1-2mm, found 2-5 metres beyond high tide mark, under a hawthorn bush.

Found on large sea defence boulders. Any comments will be much appreciated - thanks. Each 'head' approx 1-2mm, found 2-5 metres beyond high tide mark, under a hawthorn bush.