Smithson. Contr. Bot. 74: 122 (1990).
Protolog: Thallus arctissime adnatus, saxicola, 4-7 cm latus, lobis sublinearibus, 0.3-0.5 mm latis, elongatis, superne continuus, emaculatus, transversim fissurinus, sorediis isidiisque destitutus, subtus planus, niger, modice rhizinosus.
Protolog type data: Sandstone outcrops at head of ravine, Greyton Nature Reserve, north of Greyton, Riviersrand Range, Cape Province, South Africa, Grid 3418 BA, Hale 78151, 25 Oct. 1986 (US, holotype; PRE, isotype).
Type locality: South Africa, Cape Province, Riviersrand Range, north of Greyton, Greyton Nature Reserve, sandstone outcrops at head of ravine, Grid 3418 BA, Hale 78151, 25 Oct. 1986 (US - holotype; PRE - isotype).
Type locality coordinates: Data lacking.
Molecular barcode: Data lacking.
Thallus: foliose, very tightly to tightly adnate, appearing somewhat areolate at the center, 4-7 cm broad, yellowish green bur darkening somewhat at the center with age; lobes sublinear, 0.3-0.5 mm wide, elongate, sparsely dichotomously branched, short laciniate with age on the margins, separate to imbricate; upper surface continuous, emaculate, shiny, transversely cracked, soredia and isidia lacking; medulla white; lower surface plane, black, shiny, moderately rhizinate, the rhizines black, simple, rather fragile, 0.1-0.2 mm long. Pycnidia poorly developed; conidia more or less cylindrical, 0.5 x 5-6 µm. Apothecia poorly developed, sessile, 0.2-0.5 mm in diameter; spores lacking.
Photobiont: Trebouxia.
Chemistry: Stictic acid, constictic acid, norstictic acid, usnic acid.
Ecology: On rock.
Distribution Type: Endemic. South Africa, Cape Province.
Taxonomy: Data lacking.
Note:
Lichens of the Pacific Northwest