Teloschistaceae Flavoplaca maritima (Caloplaca maritima) Growth type crustose Chemical results: K+ crimson Found higher on shoreline than C. marina on rocks, concrete and walls. Sometimes extends slightly inland. A pale yellowish-white prothallus surrounds a yellow or yellowish-ochre areolate thallus with waxy yellowish-orange or deep-yellow apothecia. Thallus colour can be variable and more golden-yellow on well-lit rocks. Spores are polarilocular, 1-septate, 11-15 x 5-8 µm Similar: Caloplaca marina. Lower on shoreline, brighter orange thallus

Caloplaca maritima
Kimmeridge Bay, Dorset. January 2013