Order: Teloschistales       Family: Teloschistaceae Species: Caloplaca citrina sens lat. Growth type crustose Photos: On coastal rocks. Snave, Cork, SW Ireland. Yellow to greenish-yellow or orange thallus comprised of minute, sometimes lobed, granules covered by orange soredia. Yellowish-orange apothecia with sorediate paler margin. Very variable. Very common on walls, mortar and calcareous rocks, also sometimes found on bark, moss and soil. K+ crimson / purple.

Caloplaca citrina. Snave, Co.Cork. September 2009