Urocystidales Ustilaginales Ustilaginomycetes is the class of true smut fungi.

They are plant parasites with about 1400 recognised species in 70 genera.

[2] They have a simple septum with a septal pore cap, this is different from Agaricomycotina which has a dolipore septum with parenthoesome.

[3] The group is monophyletic (has a common ancestor).

You can help Wikipedia by expanding it.This fungal plant disease article is a stub.