Bacidia depriestiana

Bacidia depriestiana is a sorediate crustose lichen that grows on the bark of Quercus alba along forested streambanks on steep slopes in the Southern Appalachian Mountains in the United States. First described in 2021, it has so far only been found in three locations, in Tennessee, North Carolina, and South Carolina.

Description
Bacidia depriestiana has a yellowish-grey thallus, broken up into minute that are often topped are topped irregular balls of grainy blue-gray soredia. Since it reproduces asexually, chemistry is important for identifying it; it produces zeorin and atranorin.

Etymology
The species epithet, depriestiana, honors Paula DePriest, for her research contributions to Appalachian lichen biodiversity knowledge.