The thallus areoles of R. cinereovirens are grey to white grey. The black apothecia have only a very thin, even disappearing, proper margin. Ascospores are 1-septate and hyaline, or slightly brownish. It is well-distinguishable by the presence of norstictic acid in the thallus (K+ yellow, slowly turning red).
The species grows on siliceous rocks and boulder screes with long lasting snow cover, i.e., at humid and cold places. In the Czech Republic, it is sparse, but might be overlooked because it never is a dominant species. It has been collected in the Brdy, Žďárské vrchy, Hrubý Jeseník, Krkonoše and Novohradské hory Mts. In Europe, it is generally associated with boreal and montane areas.
taxonomic classification:Ascomycota → Lecanoromycetes → Rhizocarpales → Rhizocarpaceae → Rhizocarpon
Red List (Liška & Palice 2010):VU – vulnerable
Red List (Malíček 2023):C1 – critically endangered
Occurrence in the Czech Republic
All records: 4, confirmed 4. One click on a selected square displays particular record(s), including their source(s).