Robert Thompson / Lichen {Lecidea fuscoatra} Murlough Bay, County Antrim, Northern Ireland, UK, October

Duncan Mcewan / Crustaceous lichen {Lecidea dicksonii} with apothecia on rock. Scotland, UK

Duncan Mcewan / Crustaceous lichen {Lecidia disksonii} and {Sphaerophorus globosus} on rock. Scotland, UK

Duncan Mcewan / Crustaceous lichen {Lecidia disksonii} and {Rhizocarpon geographicum} on rock. Scotland,