Robuta

https://species.wikimedia.org/wiki/Umbilicaria_subg._Agyrophora Umbilicaria subg. Agyrophora - Wikispecies subg wikispecies https://bellatlas.umn.edu/taxa/index.php?tid=74352&taxauthid=1&clid=0 Minnesota Biodiversity Atlas - Agyrophora dichroa minnesota biodiversity atlas dichroa