Thompson, J., 1984. American Arctic Lichens: The Macrolichens.
Thallus branched, tufted, short, 15-25 mm tall, flattened; dichotomously branched, the branches to 1.5 mm broad, the apices acute, the cortex smooth, shining, with no pseudocyphellae, maculiform soralia toward the ends of the lobes; the cortex with abundant yellow granules, 20-30 µ thick; medulla partly hollow, partly very lax. Apothecia unknown, black pycnidia common.
Reactions: K — , KC+ , P— .
Contents: Usnic acid, sekikaic acid aggregates (Bowler & Rundell 1977), and possibly also ramalinolic acid (Krog 1968).
This species grows on rocks near the sea. It is amphi-Beringian occurring in Siberia and Alaska.