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Order: Lecanorales
Family: Psoraceae
Species: Protoblastenia incrustans Photos: On limestone wall. Temple Cronan, the Burren, Ireland BLS Burren meeting 2009 Very thin pale yellowish-grey thallus, often immersed. Very small (<0.5mm) pale yellow-orange, flat or slightly convex apothecia occur in deep pits in substrate. Spores simple, 9-13 x 4-6 µm. Found on natural hard limestone, usually in upland areas. Apothecia K+ crimson |
Protoblastenia incrustans. April 2009