Order: Lecanorales       Family: Lecanoraceae Species: Lecanora hybocarpa Growth type crustose. N.B. requires microscopical examination under polarised light (POL) for certain identification. Photos: Macroom and Rathmore, Co. Cork, SW Ireland. The whitish-grey thallus is smooth, slightly warted or granulose with scattered or aggregated pale pinkish-brown, slightly pruinose apothecia. There are large crystals in the thalline margin and coarse brown granules extend below epithcium into upper part of hymenium below tops of the asci (dissolving in K). Micro photograph below. Thallus and apothecia margins K+ yellow. Margins Pd- Widespread on deciduous trees but previously overlooked and recorded as Lecanora chlarotera sens. lat. Similar: Lecanora sinuosa and Lecanora chlarotera sens. str

Microscope photograph showing crystals and granules

Lecanora hybocarpa October 2009, April 2012