Rhizocarpon badioatrum has a brown to light brown thallus with numerous black apothecia with lecanorine margin and 1-septate brown ascospores. Its distribution area is Holarctic. It is an early colonizer of smaller stones (Nimis et al. 2018). In the Czech Republic, the lichen is quite rare, occurring from foothills to high mountains, where it commonly grows on siliceous rock outcrops, screes or exposed solitary boulders at humid and cold places. It has been found, e.g., in the Jeseníky, Krkonoše, Novohradské hory, Slavkovský les and Šumava Mts.
Literature: Nimis P. L., Hafellner J., Roux C., Clerc P., Mayrhofer H., Martellos S. & Bilovitz P. O. (2018): The lichens of the Alps – an annotated checklist. – Mycokeys 31: 1–634.
taxonomic classification:Ascomycota → Lecanoromycetes → Rhizocarpales → Rhizocarpaceae → Rhizocarpon
Red List (Liška & Palice 2010):NT – near threatened
Red List (Malíček 2023):C3 – endangered
Occurrence in the Czech Republic
All records: 24, confirmed 17. One click on a selected square displays particular record(s), including their source(s).