ABSTRACT
The teleomorph of Rhizoctonia oryzae-sativae is described as Ceratobasidium oryzae-sativae sp. nov. It differs from other known Ceratobasidium species because it has two sterigmata per basidium in conjunction with typically subglobose basidiospores. Ceratobasidium setariae comb. nov. (≡ Hypochnus setariae) is morphologically similar to C. oryzae-sativae. The description of the sclerotial state of C. setariae conforms to Sclerotium fumigatum and C. setariae is postulated to be the teleomorph of S. fumigatum. Sclerotium fumigatum is binucleate and is placed in the genus Rhizoctonia.