Hyphomycetous, phytopathogenic. Mycelium internal, consisting of hyaline, branched, septate hyphae. Stromata absent or small. Conidiophores emerging through stomata, in fascicles, unbranched or branched, straight to flexuous, at times with a single basal septum, usually up to 3-septate, medium brown, somewhat swollen in the conidiogenous region. Conidiogenous cells integrated, terminal, with flat, somewhat thickened and darkened loci. Conidia solitary, olivaceous to pale brown, thin-walled, smooth, straight or gently curved, mostly didymosporous, constricted at septum, with somewhat thickened, darkened and refractive hila.