Bacidina delicata  

Thallus pale green to fawn, usually thin, finely granular (sorediose), with granules (goniocysts) (15-)20-35(-50) μm diam. Photobiont chlorococcoid, with cells 5-10(-12) μm diam.
Anamorph: conidiomata pycnidia, ± immersed, white. Conidia 21-40 × ca 1 μm, curved.
Teleomorph: ascomata apothecia, (0.2-)0.3-0.6(-0.7) mm diam., ± flat, marginate, white, beige or orange-pink. Thalline exciple absent. True exciple hyaline, the cells gelatinised with cellular lumina (to 7 μm wide) towards the outer edge and in the lower part. Hymenium 35-50(-55) μm high, hyaline, sometimes with a weakly pigmented gelatinous epithecial layer. Hypothecium hyaline. Interascal tissue of paraphyses 1.5-2 μm diam., unbranched or with a few forked above, the apices often swollen, to 5 μm diam. Asci clavate to cylindrical-clavate, 8-spored. Apical dome K/I+ dark blue with a pale, ± conical apical cushion, wall pale, outer layer dark blue. Ascospores (21-)24-48 × 1-1.5(-2) μm, acicular, the apex acute and the base acuminate, hyaline, 3- to 7-septate, the septa narrow and inconspicuous, without a perispore or gelatinous sheath.