Order: Agyriales Family: Agyriaceae
Species: Trapeliopsis flexuosa
Photos: Wooden gate post. Gougane Barra, Co. Cork, SW Ireland.
Identification confirmed by John Douglass
Variable. Green or greenish-grey, whitish or dark bluish-grey, flattened granular areoles. Powdery grey-green to dark bluish-green soredia can spread to cover thallus. Apothecia are infrequent, discs green-grey to green-black, pinkish in deep shade.
Occurs on old fences, wooden posts, railings and garden furniture, tree stumps. Also recorded from siliceous rocks and acid bark.
Thallus: K-, C+ red, KC+ red, P-, UV+ whitish
Trapeliopsis flexuosa. Gougane Barra, September 2009