Can. J. Bot. 69, 4: 755 (1991).

Type locality: Canada, Québec, on bark of Picea mariana in bog, Brodo 16280 (CANL - holotype).

Thallus: crustose, usually thick, gray to yellow-gray, verrucose, continuous, rugose; apothecia adnate to sessile, abundant, simple, usually circular, 1.5 - 4.5 mm in diameter; disk light yellow to orange-yellow, smooth, pruinose; margin prominent, concolous with the thallus, entire, smooth, 0.2 - 0.5 mm thick. Hymenium colourless, 167 - 292 µm high, hypothecium dull brown, 49 - 74 µm thick, algal layer thick, continuous across the base of apothecium below hypothecium; asci 8-spored, spores irregular biseriate, ovoid to ellipsoid, 17 - 33 / 33 - 77 µm; paraphyses netlike.

Chemistry: Apothecial disc C+ red, KC + pink, gyrophoric acid, lecanoric acid, lichesterinic acid, protolichestinic acid (Zhao et al. 2006: 180 based on 9 specimens from Shaanxi province, China).