Fusarium heterosporum  

On host material, colonies forming small salmon pink pad-like structures within grass inflorescences, especially at the base of developing ergots. In fresh cultures, sporulation initially scattered in the aerial mycelium, then forming large, bright orange-pink sporodochia on the agar surface.  Colonies on PSA 55-70 mm diam after 10 days, with floccose aerial mycelium, initially white, becoming pink.  Colony reverse white becoming pink, sometimes with yellowish tint, with age.  Vinaceous red or dark brown pigmentation lacking. 
Anamorph: conidiomata absent. Conidiogenous cells forming from irregularly branching clusters of cells, 10-20 x 2.5-3.5 µm, cylindrical, with periclinal thickening and indistinct collarette.  Macroconidia (15-) 25-35 (-50) x 2.5-4 µm, 1-3 (-5) septate, thin-walled, indistinctly septate and with distinctly pedicellate basal cells, somewhat variable in shape, in some strains curved, slender and falcate, tapering gradually to a point, in other strains straighter and with a more abruptly pointed, beaked apical cell.  Microconidia absent, but occasional small, aseptate spores may be present.  Chlamydospores absent or sparse, globose, 8-13 µm diam.
Teleomorph: not definitely known, but similar strains from woody substrata have a teleomorph assigned to Gibberella gordonii.