Order: Lecanorales       Family: Parmeliaceae Species: Parmelia sulcata Growth type foliose. Photos: On Salix and ornamental Sorbus. County Cork, SW Ireland. Grey-blue thallus, ridged, overlapping lobes with +/- brownish tips. Network of coarse white reticulation developing greyish soredia which may spread and cover centre of thallus. Black undersurface with rhizines. Apothecia infrequent, with +/- sorediate margins. Common throughout Ireland on trees and rocks. Medulla and soredia: K+ orange-red, C-, P+ orange, UV- Similar: Parmelia saxatilis is isidiate

Parmelia sulcata. Co.Cork. December 2008 and January 2010