TYPE. UNITED STATES. Vermont, Brattleborough, Russell & Frost s.n. (FH-Tuck., lectotype designated by Hale 1967).
Description.Life form: lichenized fungus.
Thallus foliose, dark olive-brown to blackish brown, adnate; lobes under 1 mm wide. Vegetative diaspores soredia in elliptical, distinct white soralia along lobe margins, flecked with black. Photobiont Trebouxia alga. Lower surface pale to dark brown; rhizines moderately abundant to sparse. Ascomata not reported. Pycnidia black, raised, on lobe margins.