in Divakar, Del-Prado, Lumbsch, Wedin, Esslinger, Leavitt & Crespo, Am. J. Bot. 99, 12: 2023 (2012).

Basionym: Parmelia stygia var. sorediata Ach., Lich. Univ.: 471 (1810).

Type locality: Sweden (H-ACH 1414G - lectotype).

Thallus: to 6 cm diam., appressed, firmly attached. Lobes 0.5- 1.5 mm wide, discrete and elongate, flat even at tips. Upper surface olivaceous brown to greyish brown to blackish, often reticulate close to margins, usually dull. Soralia capitate, terminal on short lateral branches; isidia and pseudocyphellae lacking. Lower surface very dark brown, often paler towards the margin; rhizines concolorous with the lower surface, simple and scattered. Apothecia rare, sessile or somewhat stalked, to 2.5 mm diam. Spores ellipsoid, 9-11 x 4.5- 6 μm. Pycnidia unknown.

Photobiont: Data lacking.

Chemistry: Cortex HNO3-. Medulla C-, K-, KC-, rarely KC+ rose, PD-; perlatolic and stenosporic acids.

Ecology: On siliceous stones and boulders in open situations, often in manmade habitats, rarely on wood.

Distribution type: Widespread throughout the Nordic countries except Denmark. Circumboreal in the Northern Hemisphere. In Europe present south to the Alps.

Taxonomy: Data lacking.

Note:

Distribution Database: Distributions

Distribution Database: Discover Life

Picture Database: Tropical Lichens

Molecular Database: Genbank

Synonym Database: Index Fungorum

Synonym Database: Mycobank