The following new findings about Iranian smut fungi are presented: 1-Ustilago hordei × U. nuda hybrids are reported on Hordeum vulgare from Yazd province. Our study showed that main causal agent of covered smut in the province is above hybrids. 2- Urocystis tianschanica is newly reported from Iran on Critesion violaceum. 3- Tranzscheliella iranica is also reported from Yazd province, Deh Bala. Before our report, this species was known only from the type locality. 4- Revision of herbarium specimens of infected Loliolum subulatum revealed that smut species on these specimens belongs to Tilletia lolioli not T. bromi. All above mentioned taxa are documented by microphotographs and Persian description
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