Order: Lecanorales       Family: Parmeliaceae Species: Xanthoparmelia mougeotii Growth type foliose. Photos: On acidic upland rock. Ballingeary, Cork, SW Ireland. Thallus of narrow, radiating, +/- flat yellowish-grey lobes, closely adpressed. Black lower surface with short, simple rhizines. Centre becomes darker grey-yellow and covered with scattered pale grey soralia. Apothecia rare, discs brown, margins often sorediate. On well-lit siliceous rocks, tombstones, gravel and quartz chippings. Medulla K+ yellow-orange, C-, KC+ orange, P+ orange, UV- Similar: Arctoparmelia incurva. Medulla K-, C-, KC+ pink, P+ rust-red, UV+ blue-white

Xanthoparmelia mougeotii. February and August 2009