Description: Lichen. Thallus fruticose, corticolous, caespitose, erect, grey-green, often with a paler lower surface, 4 - 4 (- 8) cm high, lacking soredia; branching subdichotomous to irregular, moderate to intricate and entangled, + geniculate or often with fragile branchlets towards the apices; branches (0.2 -) 1.0 - 3.0 mm wide, variably inflated, from subterete to almost flat, sparingly perforate, the perforations small, ellipsoid, to 1.0 mm long, rarely extending via cracks along the margin; medullary hyphae sparse and adhering to the inner cortex wall, either loosely or densely compacted in inflated lobes or thick and felted in compressed lobes; cortex matt or shiny, smooth to rugose, with white, raised, punctiform pseudocyphellae along the margins and lamina of the branches; holdfast delimited or diffuse. Apothecia sparse to common, subterminal on geniculate branches or terminal on main and short lateral branches, spurred, or in the axils of bifurcating well-defined, rarely indistinct, spores eight per ascus, colourless, 1-septate, ellipsoid, straight or rarely slightly curved, (12 -) 14 - 16 x 4 - 6 (- 7) µm.

Chemistry: Thallus K-, KC-, P-. Containing usnic acid, homosekikaic acid (major), sekikaic acid (submajor), 4'-0-methylnorhomosekikaic acid (minor), 4'-0-methylnorsekikaic acid (trace), 4'-0-demethylsekikaic acid (+- trace), hyperhomosekikaic acid (trace) and ramalinolic acid (trace).

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