Little is known of the fungi of South Sudan. A list of fungi in Sudan was prepared by S. A. J. Tarr and published by the then Commonwealth Mycological Institute (Kew, Surrey, UK) in 1955. The list, of 383 species in 175 genera, included all fungi observed within the then boundaries of the country. Many of those records relate to what is now South Sudan. Most of the species recorded were associated with diseases of crops. The true number of species of fungi in South Sudan is probably much higher.