Caloplaca verruculifera (fertile)

Caloplaca verruculifera (fertile)

Observation - Caloplaca verruculifera (fertile). Description: On exposed top of harbour wall used as a perch by herring gulls. Dobson describes apothecia as very rare, but I now feel a bit sceptical about this.

On exposed top of harbour wall used as a perch by herring gulls. Dobson describes apothecia as "very rare", but I now feel a bit sceptical about this.