Conidiophores are typically smooth walled and uncolored to pale brown. The conidial heads (vesicles) consist of uniseriate phialides and are radiate or loosely columnar. Conidia (spores) are in chains, spherical to ellipsoidal, and rough walled. The ascomycete state is characterized by its whitish to bright yellow spherical fruiting bodies (cleistotecia) containing spherical asci, which in turn each enclose eight colorless or pale ascospores. Ascospores may or may not have equatorial crests.