In Lichen Flora of the Greater Sonoran Desert Region 2: 326 (2004); type: U.S.A., Arizona, Coconinio Co., SSW of Flagstaff, 35°00.3’N, 111°44’W, 18. Apr. 2001, T. Tønsberg 28991 (BG—holotypus, ASU—isotypus).

Thallus crustose, leprose, with powdery to slightly membranous appearance; pale bluish grey or whitish; medium to thick, up to 0.6 mm, sometimes partly loose from the substrate; shape rosettes, often distinctly wrinkled, up to 2 cm in diam.; margin delimited, lobes sometimes obscure lobes present; cortex absent; medulla present, indistinct to distinct, white; lower surface sometimes evident, white to pale brown, without tomentum or with scattered tomentose hyphae; areoles absent; squamules absent; soredia abundant, coarse, up to 200 µm in diam., densely to loosely packed; projecting hyphae sometimes present, short, can be long in marginal soredia; isidia-like structures absent. Photobiont green, coccoid.