Order: Lecanorales Family: Lecanoraceae
Species: Lecanora carpinea
Photos: On broadleaf twig. The Gearagh, Co. Cork, SW Ireland.
Thin white to greyish thallus with white prothallus. Apothecia with brownish-grey discs covered by thick white pruina.
Found on the twigs, branches and young trunks of smooth-barked deciduous trees, very rarely occurs on stonework.
Thallus: K+ yellow, C-, P+/- pale yellow, UV-.
Discs C+ yellow or orange, UV+ pale orange.
Similar: Lecanora albella. Apothecial discs C-
Immediately above Lecanora carpinea showing C+ yellow reaction. September 2009