Polycauliona phlogina

Scythioria phlogina is a species of lichen-forming fungus in the family Teloschistaceae. First described by Erik Acharius in 1803 as a variety of Parmelia citrina, it has had a long nomenclatural history, passing through genera such as Caloplaca, Xanthoria, and Polycauliona before being transferred in 2014 to the genus Scythioria on the basis of molecular phylogenetic evidence. The lichen forms a thin crustose thallus in which the small areoles are usually almost or completely dissolved into...