Distribution: Montana east to Maine, south through Appalachia; Southernmost borders of central and eastern Canadian provinces.
Conservation Status: Not of concern
Thallus olive-brown to grey-olive, lobes flattened or curled in at the sides, 1-4 mm in width, typically regularly forked with marginal pseudocyphellae; Apothecia rare, shiny red-brown, appearing on lobe tips.
PNW Herbaria: Specimen records of Cetraria arenaria in the Consortium of Pacific Northwest Herbaria database
CalPhotos: Cetraria arenaria photos