mystrosporium

from The Century Dictionary.

• noun A genus of Fungi Imperfecti, of the family Dematiaceæ, having simple or sparingly branched conidiophores and manyseptate muriform dark-brown spores. About 16 species have been described. M. adustum causes bulb-scab of Iris, and M. abrodens is said to cause a blight of wheat. See bulbscab and wheat- blight.