TYPE. UNITED STATES. CONNECTICUT, Rocky Hill, 1895, F.W. Stamer s.n. (M).
Description. Lichenized fungus.
Thallus foliose, often circular in outline, pale greenish gray, adnate on substrate; lobes 0.6-1.5 mm wide; vegetative diaspores laminal, round soralia containing greenish or whitish granular soredia. Photobiont trebouxoid alga. Lower surface corticate, white with simple, white rhizines. Ascomata lecanorine apothecia, rare.
Chemistry. Cortex and medulla K+ yellow; secondary metabolites atronorin and unknown terpenes.
Substrate and Habitat. Mostly on bark of hardwood trees in hardwood and mixed forests.
Distribution. Eastern North America; in North Carolina common throughout.
Brodo, I.M., S.D. Sharnoff & S. Sharnoff. (2001) Lichens of North America. New Haven: Yale University Press. 725 pp.
Evans, A.W. & M.S. Meyrowitz. (1926) Catalogue of the lichens of Connecticut. State of Connecticut, State Geological and Natural History Survey Bulletin 37: 1-49 pp (original diagnosis and notes by G.K. Merrill).