https://www.semanticscholar.org/topic/Placopyrenium-trachyticum/12341788
Placopyrenium trachyticum | Semantic Scholar
semanticscholar
https://bellatlas.umn.edu/taxa/index.php?taxon=Endopyrenium%20trachyticum
Minnesota Biodiversity Atlas - Endopyrenium trachyticum
minnesota biodiversity atlas