Bacidia laurocerasi  

Thallus pale grey or green-grey, usually thin, smooth, often cracked or ±  warted. Photobiont cells 5-12(-14) μm diam.
Anamorph: conidiomata pycnidia, immersed, ca 100 μm diam. with hyaline peridium. Conidia 13-17 × ca 1 μm, curved.
Teleomorph: ascomata apothecia, (0.2-) 0.4-1 (-1.2) mm diam., usually numerous, flat and marginate to convex and immarginate, pink-brown (in shade) to black. True exciple purple-brown, K+ intensifying purple at the outer edge, internally pale red-brown but often darker and sometimes with a purple tinge in the upper part, without crystalline inclusions. Epithecium pale grey-brown (K–) to dark ± purple-brown, K+ intensifying purple, N+ red. Hymenium 65-90 μm tall, hyaline. Hypothecium colourless or pale straw, but lower part often pale orange- or red-brown towards the exciple, the coloration rarely extending to the centre. Interascal tissue of paraphyses 1-1.5 μm diam., simple or branched above, the apices often pigmented and swollen to ca 5 μm diam. Asci clavate to cylindric-clavate,  the apical dome K/I+ dark blue with a pale, ± conical apical cushion and the outer layer staining dark blue, 8-spored. Ascospores 34-70(-86) × 2.5-4 μm, acicular, 7- to 16-septate at maturity, hyaline, smooth, without an epispore, gelatinous sheath or appendages.