Order: Lecanorales       Family: Lecanoraceae Species: Lecanora argentata Growth type crustose Photos: Foynes, Co. Limerick and Drinagh, Co. Cork, Ireland Similiar to Lecanora chlarotera with massive crystals in apothecia margins but discs are red-brown, darker brown or sometimes piedbald and there are no granules in the epithecium. Thallus whitish, uneven or +/- warted and smooth at margins, usually with a black prothallus visible. Microscope photographs showing crystals below. Chemistry K+ yellow, C-, Pd weak yellow, UV- Found on the twigs, branches and trunks of deciduous trees Similar: L. campestris and L. horiza also have small crystals in the margins and no granules on epithecium. L. intumescens has small crystals in the margins and granules in the epithecium

Microscope photographs



Lecanora argentata. September 2010, February 2011