Verh. zool.-bot. Ges. Wien 26: 435 (1876).

Type: Hawaiian Islands, Pali, on rocks. H. Wawra 1738, 1868 – 1871 (W-holotype, not seen).

Thallus: Saxicolous, orange-brown (possibly dead), caespitose, to 1 cm high. Branching dense, with many small lateral branches, anastomoses visible among the branches; branches narrow, subterete to flattened at the base, 0.2 – 1.4 mm wide, surface pitted and uneven; no pseudocyphellae seen; holdfast delimited and blackened. Apothecia common, subterminal, marginal, laminal and some geniculate, disc concave to plane when very young with a thick thalline margin, plane to convex, with a thin margin when mature, 1 – 4 mm in diameter. Ascospores 8 per ascus, elliptical, 1-septate, 9 – 14 µm long, 3 – 4 µm wide.

Photobiont:

Chemistry: Cortex: usnic acid; medulla: divaricatic acid.

Ecology: It grows in a coastal habitat that is easily reached by anyone.