Pale bluish grey (fades to white in the herbarium), poorly delimited, consisting of loosely to densely packed soredia/consoredia without medulla and prothallus, initially of scattered soredia/consoredia, then forming small patches which fuse to form extensive, irregular, ± continuous thalli, rather thin, 0.1–0.2 mm thick; soredia 20–30 µm in diam., filled with small crystals, with short, irregular, projecting hyphae, 25–30 µm long; consoredia to 100 µm in diam. (after Lendemer 2005).
Greenland specimens that were assigned to this species had slightly larger soredia (up to 65 µm in diam.) and slightly shorter projecting hyphae; otherwise they correspond to this description.
