Beih. Bot. Centralbl. 13: 161 (1902). ------ or
Beih. Botan. Centralbl. 13: 149, 161 (1902) IF.
Basionym: Lecanora obpallens Nyl. ex Hasse, Bull. Torrey bot. Club 24: 446 (1897).
Synonyms: Index Fungorum
Protolog: Data lacking.
Type locality: USA, California, Data lacking.
Barcode: Data lacking.
Coordinates: Data lacking.
Thallus: crustose, areoles dispersed to clustered, yellow-brown to dark brown, usually 0.2-0.7 mm in diameter, round with a single brown immersed apothecia. Areoles epruinose to very heavily pruinose. Upper surface smooth or rugulose with a distinct foveolate formation of small pits around the disc. Pits distinctive and not associated with a primordium and abundant in most specimens. Paraphyses 1.5-2.4 µm diameter at their base with usually unexpanded apices often with dark caps. Ascospores simple, hyaline, ellipsoid, 3.9-5-7.1 x 1.0-1.9-2.5 µm (Knudsen 2006: 9).
Photobiont: Trebouxioid green alga.
Chemistry: KC+ pink-red. Specimens sometimes test negative but still have some chemistry. Cortex contains gyrophoric acid (major), lecanoric acid (minor), 3-hydroxygyrophoric acid (trace), methyl lecanorate (trace) (John A. Elix pers. com. fide Knudsen 2006: 9). Spot tests: cortex KC+ red, gyrophoric acid (major), lecanoric acid (minor), + 3-hydroxygyrophoric acid (trace), + methyl lecanorate (trace) (Knudsen et al. 2008: 8).
Ecology: Terricolous, but common on sandstone and acid rock. On soil, sandstone, granite, and volcanic rock above 500 meters.
Molecular data: Genbank
Distribution: Bolivia, Ecuador, very common in western North America. Database
Note:
verrucose. Verrucae contiguous to scattered, usually rounded, 0.2-0.7(-2.0) mm wide, rarely more than 0.5 mm thick, broadly attached. Upper surface pale to dark brown with minute sterile pits and non-radial striations around the apothecia. There is usually a single apothecia per verruca. Algal layer is even. Upper cortex paraplectenchymatous, 20-30(-35) µm thick; cells: round to angular, 3-5 µm wide. Apothecia usually one per verruca; disc immersed, dark brown, epruinose, round, to 1 mm wide. Parathecium narrow. Hymenium hyaline, 100-135 µm tall. Epihymenium reddish-brown. Paraphyses ca. 2 µm diam., apices unexpanded but often with pigmented apices. Asci 90-120 x 13-20 µm, clavate; ascospores 100+ per ascus, ellipsoid, 4-5 x 2 µm (Knudsen et al. 2008: 8).