Usneae aurantiaco-atrae similis, sed axis tenuis (19–43%) et habitus terricola.
Typus: Falkland Islands, West Falklands, Port Howard, summit ridge of Mt. Maria, UTM UC 2078–2079 [51°608833’S, 59°595667’W], 2000–2150 ft. [610– 655 m], feldmark and outcrops, 28 January 1968, H. A. Imshaug (41396) & R. C. Harris (MSC-0108542— holotypus).
Description
Thallus fruticose, yellow-green, straggling on ground, with no holdfast, up to 22 cm long, anisotomically branched, main branch not clearly distinguished, thickest branches to 0.8 mm diam., papillate, annulated towards ends. In section, the central axis varies from 19–43% of total branch diameter.
Apothecia in central part of thallus, lateral, on larger branches only, flat, up to 7 mm diam.; disc dark brown to black, thalline margin very thin, to 0.1 mm broad proper margin on outside with low ridges and papillae, no rays present.
Chemistry. Usnic, salazinic, norstictic acids by TLC.
Distribution and ecology. Straggling on soil on mountain tops in West Falkland. Endemic.