Ascomata 130-190 µm diam, ± spherical to ovoid, cinnamon brown, rhizoids well-developed. Peridium pale brown, composed of interwoven hyphal cells, the upper part covered in hairs. Ascomatal hairs dimorphic, one type seta-like and swollen at the base, and the other dark brown thick-walled dichotomously branched hairs 5-6 µm diam which may be encrusted with yellow-green crystals. Interascal tissue none, at least at maturity. Asci 26-35 x 8-11 µm, clavate, long-stalked, evanescent at an early stage, 8-spored. Ascospores 9-12 x 2.5-3 µm, narrowly fusiform-cylindric, not flattened laterally, straight or slightly inaequilateral, pale grey-brown when mature, without visible germ pores.
Colonies rapidly growing, aerial mycelium usually sparse, often with red or orange exudates.