NCIt definition : A genus of smut fungi in the phylum Basidiomycota with a branched, septate, hyaline,
intercellular mycellium, with or without haustoria. Species in this genus infect the
floral parts of wheat, barley, oat, maize, sugarcane, rye and wild grasses.;
Alternative definition : CDISC: Any fungal organism that is not assigned to the species level but can be assigned
to the Ustilago genus level.;