Order: Teloschistales       Family: Teloschistaceae Polycauliona verruculifera (Caloplaca verruculifera) Growth type: Placodioid (crustose with lobed margins) Photos: On coastal rock. Mizen Head, Co. Cork, SW Ireland. Thallus usually yellow to greenish-yellow (rarely slightly orange-tinged) with elongated, radiating lobes. The centre of the thallus is covered with irregular flattened-globose isidia, apothecia are rare. K+ crimson / purple. Coastal, often on nutrient-enriched bird-perching sites. Similar: Variospora thallincola (Caloplaca thallincola)

Polycauliona verruculifera (Caloplaca verruculifera) June 2009