Porina coralloidea  

Thallus superficial, dull dark grey with a pinkish or purplish tinge. Isidia often crowded, 160-210 × 40-70 µm, simple or rarely branched, cylindrical or elongate-ovoid, usually tapering to the apex, the apex often pale, formed of a tuft of hyaline hyphae. Photobiont Trentepohlia.
Anamorph: no information available.
Teleomorph: ascomata perithecia, 300-400 µm diam., one to three quarters immersed, scattered and sometimes not obviously associated with the thallus, black.  Involucrellum dark purplish-brown, K+ grey-brown. Exciple yellow (Porina-yellow), or with some pigment like the involucrellum. Ascospores (35-) 40-57 (-63) × (5-) 8-13 (-15) μm, (6-) 9- to 11- (to 12-) septate.