Order: Teloschistales       Family: Teloschistaceae Species: Caloplaca crenularia Growth type crustose Photos: On coastal rock. Bantry, Cork, SW Ireland. Identification needs confirming Grey cracked or areolate thallus that may not persist. Numerous rusty orange-red roughened apothecia, colour remaining unchanged when wet. Asci 8-spored, ascospores 12-14 x 6-8 µm. C. ceraceae has discs that become greenish when wet. Shaded or well-lit siliceous rocks, can be found inland as well as on coastal rocks. Apothecia: K+ crimson / purple. Similar: C. ferruginea. Only occurs on trees.

     






Caloplaca crenularia on coastal rocks. February 2009