A collection of Cordyceps subsessilis is documented. Axenic cultures o
f single part ascospores produced an anamorph attributable to the comm
on soil hyphomycete Tolypocladium inflatum (= T. niveum). Efrapeptins
were identified in culture filtrates of the anamorph. The efrapeptin p
rofile of the C. subsessilis anamorph was found to be similar to that
of other isolates of T. inflatum. This is the first report of a teleom
orph for this important anamorph genus.