Ochrolechiaceae Lepra albescens var. corallina (Pertusaria albescens var. corallina) Growth type crustose Chemical reactions negative. Taste-test for oxalic acid negative Widespread, over-grows mosses on bark and sheltered stones. Similar to P. albescens var. albescens but has coarse, poorly defined, knotted, warted or granular soralia and a thickened thallus. Similar: Pertusaria amara. Taste test positive

Pertusaria albescens var corallina
On Oak. Upton Park, Dorset. January 2013