TYPE. “Habitat truncicola in Texas, in regione Van Zandt County: J. Boll, cui grato amino speciem dicavi.” (Müller 1877).  UNITED STATES. Texas, Van Zandt County, J. Boll s.n. (FH, M, PH, US).

Description. Life form: lichenized fungus.

Thallus foliose, blue-gray, adnate, 6-12 cm broad; lobes 2-6(-10) mm wide; upper surface with white pseudocyphellae, becoming heavily wrinkled and folded in older parts, with many small lobules developing on the thallus surface and edges; lower surface pale tan throughout, with pale rhizines. Apothecia usually abundant, with broad disks, 1-6 mm diam., concave to convoluted, sessile. Pycnidia abundant, appearing as black dots on the thallus surface.

Chemistry. Cortex K+ pale yellow (atronorin); medulla K-, KC-, C-, PD-; protolichestrinic and lichenestrinic acids.

Substrate and Habitat. On hardwood trees in open woodlands, fields and roadsides.

Distribution. Eastern North America; in North Carolina found throughout, primarily in Blue Ridge and Piedmont ecoregions.

Literature

Brodo, I.M., S. Duran Sharnoff & S. Sharnoff. (2001) Lichens of North America. Yale University Press, New Haven & London. 795 pp.

Hinds, J.W. & P.L. Hinds (2007) The Macrolichens of New England. Memoirs of the New York Botanical Garden No. 96. New York Botanical Garden Press, Bronx, New York. 584 pp.

Müller, J. (1877) Lichenologische Beiträge. V. Flora (Regensburg) 60(5): 77-80 (original description as Parmelia bolliana).