Species: Evernia prunastri
Photos: On fallen deciduous twigs. Ballingeary, Cork, SW Ireland.
Greyish to yellow-green strap-like thallus, patchy-white beneath. Lobes flattened, upper surface with netted ridges that can become sorediate. Dark red-brown apothecia are only rarely produced.
Usually found on acid-barked deciduous trees, occasionally on fences or rocks. K+ yellow
Similar: Pseudevernia furfuracea, upper surface isidiate.
Ramalina farinacea, upper and lower surfaces +/- same colour.