Which fungal disease spreads by seed and flowers?

Fungal disease, loose smut of whet spreads by seed and flowers. The causal organism of this disease is Ustilago fungus. It is an internal parasite. It has a dikaryotic mycelium which remains within the intercellular spaces of the host tissue. This fungus infects the ovary of the host flower as a result of which the masses of teliospores or brand spores are formed in place of grains, Teliospores are not surrounded by any wall hence, called loose smut.