Notes on Tolypocladium and related genera

The hyphomycete genus Tolypocladium W. Gams is compared with similar genera possessing swollen phialides and amerosporous conidia borne in slimy heads. Tolypocladium niveum (O. Rostrup) comb. nov. is proposed as the correct name for the type species. Cephalosporium balanoides Dreschler and Verticillium microsporum Jaap are redisposed in Tolypocladium, and two new species of Tolypocladium are described from tundra soils.