The ascomata have ostioles (openings) at the top, and are arranged in small dark brown colonies with light grey patches where the cuticle is detached from the plant epidermis.
The hamathecium (a term referring to all hyphae that develop between asci of the hymenium) is made of branched pseudoparaphyses measuring 3–6 μm in diameter.
The ascospores are biseriate (arranged into parallel rows in the ascus), ellipsoidal to spindle-shaped, sometimes strongly tapered at the lower end, contain three septa, and measure 21–275 by 6–9 μm.
They are strongly constricted at the central septum, less so at the others, hyaline, and surrounded by a gelatinous sheath with an umbilicus (a single compact strand of fused hyphae) at the lower end.
The fungus fruits between 49 and 65 cm (19 and 26 in) above the level of the rhizoid, and it is consequently considered a halotolerant species, because it is occasionally exposed to sea spray.