Ascomata subcuticular. In vertical section upper wall of unopened ascomata up to 20 µm thick, comprising brown to dark brown, thick-walled, angular cells. In opened ascomata upper wall 15-20 µm thick, becoming gradually narrower toward outer edge, comprising dark brown, thick-walled, angular cells. No differentiated layer associated with edge of the ascomatal opening. Darkened lower wall absent.

Paraphyses 1.5-2 µm diam., swelling up to 5 µm diam. at the clavate apex, extending 5-10 µm beyond asci. Asci 65-90 x 9-10 µm, clavate, tapering gradually to rounded apex, wall undifferentiated at apex, 8 spored, spores extending almost to base, maturation sequential. Ascospores 23-32 x 3-3.5 µm apex rounded, tapering to more or less acute base, 1 septate, surrounded by narrow gelatinous sheath.