Ann. Mycol. 36: 350 (1938). Data lacking in IF (1938).

Thallus: ash-gray or white, over rocks, thick to very thick, even lifting off substratum, margin entire and not zoned, surface smooth to rough-folded, shining or dull, lacking soredia or isidia. Fertile verrucae of same color as thallus, base narrowed, flat-topped or hemispherical, dispersed or crowded, to 3 mm broad; margins thickened or sometimes split or crenulate; ostioles 1-3(-5) per verruca, usually sunken, sometimes broadening and fusing to form a pseudolecanorate disk. Apothecia up to 6 per verruca but usually less, center hyaline to pink or red; epithecium dark brown or black, K+ strongly violet; asci clavate or cylindrical; spores 4 (occasionally 2,3, or 5), biseriate or uniseriate, ellipsoid to fusiform, outer wall 1-5 µm, inner wall 2-10 µm, smooth or concentrically laminated at ends and often with apical walls thickened and convex inward, 78-229 x 33-86 µm (Thomson 1997: 446).

Photobiont: Data lacking.

Chemistry: Cortex all tests negative; medulla K+ yellow turning red, C-, KC-, P+ yellow turning yellow-orange. Norstictic and connorstictic acids (Thomson 1997: 447).

Ecology: On rocks or rarely over humus (Thomson 1997: 447).

Distribution: Amphi-beringian, mainly known from Alaska but with a single locality on Devon Island, Northwest Territories [today Nunavut] (Thomson 1997: 447). Database

Molecular data: Genbank

Mycobank: Mycobank

Note:

Pictures: Tropical Lichens