Stroma:
Stromata usually simple, 2-5 cm long, stipitate, arising from any joint but often between the head and thorax of infected adult wasp (Hymenoptera). Stipe ochraceous to cream yellow, slender, fibrous, often slightly twisted, 0.5-1 mm thick. Fertile head usually fusoid , 5-8 mm in length and 1.5-2 mm in thickness, ochraceous to cream yellow, rough on the upper surface from the apices of the perithecia.