A species of a prominent grey thallus containing norstictic acid (turning red with KOH), forming black apothecia with a white pruina on their margins. It usually grows on a bark or wood of deciduous trees, especially on oaks. It belongs to rare lichens in central Europe, more localities are known only from the Alps. There are various historical data from the Czech Republic, but only those reported by Nádvorník (1940), two from the Třebíč region and one from the Petrovice vicinity in the Moravian Karst (all from wood) are considered reliable. Vězda (1988) confirmed the occurrence in the Třebíč region, unfortunately, he did not specify the locality. Recently, the species has been found on beech wood in Studenec in the Lužické hory Hills (an unpublished record).
Literatura: Nádvorník J. (1940): Systematische Übersicht der mitteleuropäischen Arten der Flechtenfamilie Caliciaceae. – Preslia 18–19: 113–129. Vězda A. (1998): Flóra lišejníků v oblasti vlivu energetické soustavy Dukovany-Dalešice. – Acta scientiarum naturalium musei moraviae occidentalis Třebíč 30: 77–120.taxonomic classification:
All records: 6, confirmed 0. One click on a selected square displays particular record(s), including their source(s).