Abstract
A new species and genus of the gramini-colous Clavicipitaceae are described. Neoclaviceps monostipa infects individual florets in the same way as species of genus Claviceps but does not produce sclerotia. In culture it shows dimorphism in production of a yeast-like microcyclic conidiation (ephelidial) phase and a mycelial phase. Phylogenetic analysis of the 26S large subunit rDNA suggests that Neoclaviceps along with genus Myriogenospora are evolutionary intermediate between Claviceps and Balansia.