TYPE. UNITED STATES. MARYLAND, Anne Arundel County, Benfield, on trunks of pines, 8.VII.1911, C.C. Plitt 364 (MICH, isotype; US, possible isotype).

Description. Lichenized fungus.

Thallus foliose. Lobes radiating, linear, appressed, ~0.5 mm wide, greenish yellow. Photobiont Trebouxia? alga; vegetative diaspores soredia developing from laminal pustules. Lower surface yellowish white; rhizines simple, pale. Ascomata lecanorine apothecia, sessile, uncommon (originally described as sterile). Disk brown; exciple hyaline; epithecium brownish; hymenium hyaline; subhymenium hyaline; paraphyses simple. Asci 8-spored; ascal walls K/I+ blue. Ascospores colorless, reniform, simple. Pycnidia black, laminal, immersed; conidia falcate (strongly curved).

Chemistry. Cortex UV+ blue-white, K+ yellow, KC-, C-; medulla K-, KC-, C-; soredia K+ yellow, KC-, C-; usnic and divaricatic acids.

Substrate and Habitat. On conifers in exposed habitats.

Distribution. Eastern North America; in North Carolina primarily in coastal plain 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.

Gyelnik, V. (1932) Über einige Arten der Gattung Parmeliopsis (Stiz.) Nyl. Annales Mycologici 30: 456-459.

Meyer, S.L.F. (1982) Segregation of the New Lichen Genus Foraminella from Parmeliopsis. Mycologia 74(4): 592–598 (description as Foraminella subambigua).