Ascomata in vertical section with an upper wall up to 110 µm thick, comprising mostly brown to pale brown, slightly thick-walled, angular cells , but with dark brown, thick-walled cells along the outside of the wall, adjacent to the host tissue. The part of the wall adjacent to the ascomatal opening is lined with an extensive layer of thin-walled, cylindric, 3-5 µm diam., elements forming a palisade-like layer up to 100 µm wide in places. This layer is partially and irregularly covered with a deposit of yellowish, granular material. Lower wall 15-20 µm thick, of several layers of angular to cylindric cells, the outermost 1-2 layers of cells dark brown and thick-walled.

Paraphyses with anastomoses near the bases, 1.5-2 µm diam., more or less undifferentiated at apex, extending 10-20 µm beyond asci. Asci 140-180 x 17-20 µm, clavate, tapering to broad, subtruncate apex, wall undifferentiated at apex, nonamyloid, 8spored, spores confined to upper 90-110 µm of ascus, ascus development sequential. Ascospores 17-25 x 5-7.5 µm, elliptic, (0-)1 septate, hyaline, surrounded by a 2-5 µm thick gelatinous sheath.