A new smut fungus, Sporisorium kenyanum M. Pi¹tek, is described and illustrated from infected plants of Setaria pallide-fusca (Schumach.) C. E.
Hubb. collected in Kenya, Africa. The species is characterized by the following: long twisted sori produced on the distal parts of sterile shoots; the presence of spore balls consisting of small, finely verrucose-echinulate spores; and the absence of sterile cells. It is similar to Sporisorium panici-leucophaei (Henn.) M.
Piepenbr. on various species of Digitaria, Echinochloa, Oplismenopsis and Panicum in Australia and North and South America. However, in this latter smut the spores are larger, somewhat more prominently echinulate, and somewhat more variable in shape and size than those of S. kenyanum.
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