THE FUNGAL FLORA OF A BOREAL FOREST RAW HUMUS

Abstract
The fungi present in the raw humus under black spruce in the boreal forest of Quebec were studied by the soil-washing technique. Penicillium, Pullularia, and yeasts together comprised 75-94% of isolates from the washings and 42-77% of those from the washed particles. There was evidence that Penicillium spp. existed to a significant extent in the mycelial state. Aspergillus and Trichoderma spp. were absent or rare. The possible ecological significance of the high incidence of Pullularia and yeasts is discussed.