Thallus fruticose, tufted, erect or ± pendulous and straggling, to 15 cm long, saxicolous, attached by a basal holdfast. Branches terete, radial in structure, consisting of a central chondroid axis, medulla and cortex, ± branched, with or without lateral fibrils. Surface yellow or greenish-yellow, ± variegated with black or purplish-black. Medulla lax and arachnoid or compact, K+ or -. Chondroid axis 073 to 064 diam. of branch in thickness, hard, opaque or corneous, cylindrical or slightly irregular. Isidia absent. Soredia present or absent, when present in rounded or irregular soralia, concave-eroded to convex-pulvinate, pulverulent to compacted or granular, yellow to blackish. Apothecia when present geniculate, lateral on branches, lecanorine, with or without ray-like branchlets, thalline exciple smooth or warted or wrinkled, concolorous with thallus, disc black or bluish-black, matt or slightly shining, never pruinose. Ascospores 8 per ascus, simple, ellipsoid to subglobose, colourless, 3-5 × 5-8(-10) µm.