Species: Caloplaca thallincolaGrowth type placodioid (crustose with lobed margins)
Photos: On coastal rocks. Co. Cork, SW Ireland.
Thallus yellowish-orange to bright orange, areolate in the centre with long convex lobes radiating outwards. Scattered apothecia in centre with margins the same colour as the thallus.
K+ crimson / purple.
Only found on hard coastal, sheltered, siliceous rocks, often occuring with Verrucaria maura
Similar: Caloplaca flavescens.
Caloplaca thallincola. Coastal rock, Bantry, Co.Cork. December 2008