Thallus dorsiventral but loose on the substratum and rising almost fruticose, lobes to 2 mm broad and to 4 cm long, slightly channeled above; upper side dark olive-brown to blackish brown, smooth; underside nearly the same color, slightly dented in spots; pseudocyphellae few or absent; margins with cilia which are simple or sparingly branched; tips not rounded, pointed; pycnidia nearly lacking. Cortex prosoplectenchymatous. Apothecia not known.

Reactions: K -, C —, KC -, P -.

Contents: rangiformic and norrangiformic acids.

Growing on soils and the twigs of Betula this species appears to be a rather rare member of the Beringian element in the arctic, ranging in the rare collections as far east as Baffin Island in the American Arctic.