Fungi Outer Hebrides

Family: Psoraceae

Protoblastenia rupestris (Scop.) J. Steiner

Type: Crustose

Thin, greenish, pale to orange-grey, or grey-brown, areolate thallus. Apothecia pale to deep orange, often strongly convex. Extremely common and widespread on rocks, concrete and even asphalt

Smith, C.W. et al. editors (2009) The Lichens of Great Britain and Irelandd
Dobson, F.S. (2018) Lichens: an Illustrated Guide to the British and Irish Species