Rhizocarpon postumum is distinguished from a common R. reductum by smaller spores, not more than 8-celled. It is widely distributed but rare in Europe. It grows on siliceous rocks at humid places, e.g., near watercourses. In the Czech Republic, it has recently been published from Labský důl in the Krkonoše Mts and from the Klabava brook valley in the Brdy highlands. An unpublished record is from the Čertova stráň in the Šumava Mts.taxonomic classification:
All records: 5, confirmed 3. One click on a selected square displays particular record(s), including their source(s).