Biscogniauxia nummularia decline of European beech ("Fagus sylvatica") in Sicily and Calabria (Italy) has been linked to "B. nummularia" and experiments have suggested that this ascomycete plays a primary pathogenic role under certain environmental conditions. It typically causes strip‐cankering and general wood decay. Biscogniauxia nummularia Biscogniauxia nummularia is a plant pathogen in the family Xylariaceae, known as the beech tarcrust. The specific epithet is derived from the Latin "nummus" meaning a coin, referring to the often rounded and coin-like encrustations. The fruit body forms a thick and shiny black crust, on beech ("Fagus") bark and is found at all times of the
Luzula sylvatica least greenish throughout winter. The leaves can also help to differentiate the plant from similar-looking plants in the closely related genus "Juncus", as scattered white hairs can be found along the leaf edges. Its tepals are , with flowers which grow in groups of 3 or 4. From mid-spring to summer, "L. sylvatica " produces flowers in open panicles which are very small, chestnut-brown in colour and can be found in dense and lax clusters. "L. sylvatica" is sometimes stoloniferous. "Luzula sylvatica" is both anemophilous and entomophilous, in that it can be pollinated by either wind or insect. "L. sylvatica"'s