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Abstract
The two new Ascomycetes (Hypocreales), Valsonectria simpsonii and Hypocrea cinereoflava, are described. Valsonectria simpsonii produces immersed groups of perithecia with orange ostioles. Its anamorph is an undescribed species of Stilbella that has whitish, smooth synnemata with monoverticillate conidiophore branching. Endocreas is a later synonym of Valsonectria; the only known species of Endocreas, E. lasiacidis, is transferred to Valsonectria. The generic concept of Valsonectria is discussed and a key to its species is provided. Hypocrea cinereoflava produces effused, grayish yellow stromata with immersed, KOH-perithecia. Its anamorph is Stilbella flavipes, which produces white to greenish synnemata. A mycelial synanamorph is also produced, which has similarities to species of Trichoderma sect. Hypocreanum.