Robert Thompson / Reindeer moss (Cladonia portentosa) Peatlands Park, Portadown, Co. Armagh, Northern Ireland. November

Nick Upton / Reindeer moss (Cladonia portentosa) lichen growing on the mossy floor of a pine wood, Glengarry forest, Lochaber, Scotland, UK, September.

Colin Varndell / Lichen (Cladonia impexa), Winfrith Heath, Dorset, England, UK, May.

Chris Mattison / Reindeer moss (Cladonia portentosa) Peak District National Park, Derbyshire, UK

Philippe Clement / Reindeer lichen (Cladina portentosa) on pine tree bark, Italian Alps, Gran Paradiso National Park, Italy. June

Philippe Clement / Reindeer lichen (Cladina portentosa) on pine tree bark, Italian Alps, Gran Paradiso National Park, June

Robert Thompson / Lichen {Cladonia portentosa} Rehaghy Mountain, County Tyrone, Republic of Ireland, January

Robert Thompson / Lichen {Cladonia portentosa} Rehaghy Mountain, County Tyrone, Republic of Ireland, January

Robert Thompson / Lichen {Cladonia portentosa} Argory Estate, County Armagh, Northern Ireland, December

Adrian Davies / Lichen {Cladonia portentosa} Snowdonia, Wales, UK

GRAHAM HATHERLEY / Lichens {Cladonia floerkeana} and {Cladonia portentosa} with fruiting bodies, Dorset, UK

Jason Smalley / Lichen growing on sand dune {Cladonia portentosa} Merseyside UK