Ustulina deusta (Fr.) Petrak Fruit body forming irregular wavy cushions or encrusting the substrate, greyish white in the early stages soon becoming brittle enough to crush between the fingers, finally black and very brittle resembling charred wood. Asci 300 x 15m. Spores black, fusiform, 28–34 x 7–10um. Habitat on old dead stumps or roots of deciduous trees especially beech. Season late spring to summer, although the blackened state may be seen all year round. Common. Not edible. Found In Europe.