A crustose species with a grey to creamy grey thallus that is smooth or warted and lacks a prothallus. There are usually numerous apothecia with buff to red-brown discs and smooth or slightly crenulate margins.
Thallus: C-, K+ yellow, UV+ reflecting mauve-purple
In Scotland, Lecanora chlarotera is a widespread species on trees. BLS distribution map
Lecanora chlarotera is often found alongside Lecidella elaeochroma and Arthonia radiata in a pioneer community on deciduous trees.
Lecanora chlarotera is distinguished from Lecanora pulicaris on basis of the apothecial discs being less dark.
scottishlichens.co.uk 