Order: Teloschistales       Family: Teloschistaceae Species: Blastenia crenularia (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. Apothecia: K+ crimson / purple. On shaded or well-lit siliceous rocks, inland as well as coastal. Similar: Caloplaca ferruginea only occurs on trees. Caloplaca ceraceae has discs that become greenish when wet.

     




Caloplaca crenularia on coastal rocks. February 2009