Flavoplaca dichroa  

Thallus crustose, granular-areolate with deep cracks, effuse at the margin, pale yellow-orange to orange; areoles flat to convex, round to flexuose or sub-lobate at margin; surface dissolved into blastidia or granules, (25-)30-60(-70) μm wide, which can appear sorediate; prothallus absent or pale yellow.
Anamorph: not known.
Teleomorph: ascomata apothecia, frequent, adnate to sessile, 0.3-1 mm diam., constricted at the base, round to irregular, disc K+ purple, plane, or somewhat convex, orange, lacking pruina, often uneven or crenulate, rarely blastidiate; thalline margin thick, proper margin present; paraphyses widened to 6 μm at the apex. Ascospores polarilocular, (11-)12-16.5(-17) μm, septum 2.5-4 μm, often poorly developed, 1/7-1/10 length of ascospore, spore wall uniformly 2 μm thick, lumen characteristically hour-glass (sand-clock) shaped.
Chemistry: all parts K+ purple.