Order: Lecanorales       Family: Bacidiaceae Species: Japewiella tavaresiana Growth type crustose. Photobiont chlorococcoid Photos: Gougane Barra, Cork and Killarney, Co. Kerry, SW Ireland. Immersed or thin white thallus, usually with a thin, dark prothallus. Reddish-brown discs darkening to dark brown or black. The ascus is 8-spored with simple spores 13-18 x 8-10 µm. Micro photo below. On bark and twigs of smooth barked trees, most frequent on Salix in damp woods and willow carr. Often with Lecanora jamesii. Chemical reactions negative, very rarely K+ pale yellow, UV-

Microscope photograph

Japewiella tavaresiana. August 2009, January 2012 and August 2024