Order: Lecanorales       Family: Parmeliaceae Species: Hypotrachyna laevigata Growth type foliose. Confirmed by John Douglass and Andy Acton Photos: On rock and tree trunk. Co. Cork, SW Ireland. Light bluish-grey or grey-green thallus, fairly narrow lobes with curved axils and overlapping square-cut tips. Black under-surface with dichotomously branched rhizines reaching edges. Medulla white. Lobe-tips sorediate, apothecia are rare, discs dark brown, exciple +/- sorediate, initially entire but becoming torn. Found on acidic trees and rocks, sometimes over-growing mosses. Cortex K+ yellow, medulla and soredia K-, C+ orange, KC+ orange Similar: Hypotrachyna endochlora and Hypotrachyna sinuosa

Hypotrachyna laevigata March and November 2009. Fertile specimen April 2010