Biscogniauxia marginata

Biscogniauxia marginata, commonly known as the Beech Woodwart, is a species of fungus in the family Xylariaceae. This fungus is found predominantly in Europe, but has been reported in other parts of the world. It is a saprophytic fungus, meaning it feeds on dead or decaying organic material, specifically hardwood trees such as the beech.

Description

Biscogniauxia marginata is characterized by its perithecia, flask-shaped structures that produce ascospores. The perithecia are embedded in the stroma, a mass of fungal tissue, and are visible as small black dots on the surface. The ascospores are released through a small opening at the top of the perithecia, known as the ostiole. The spores are dark brown, elliptical, and have a germ slit.

Habitat and distribution

Biscogniauxia marginata is found primarily on the dead wood of hardwood trees, particularly the beech. It is a common species in Europe, but has also been reported in North America, Asia, and Australia. The fungus is typically found in forests, parks, and other areas with mature trees.

Pathogenicity

While Biscogniauxia marginata is primarily a saprophyte, it can also act as a pathogen, causing a disease known as beech bark disease. This disease is characterized by the formation of cankers on the bark of the tree, which can lead to the death of the tree if left untreated.

Conservation

Due to its widespread distribution and common occurrence, Biscogniauxia marginata is not considered to be at risk of extinction. However, changes in forest management practices, such as the removal of dead wood, could potentially impact populations of this fungus.

See also

• List of Xylariaceae genera
• Beech Bark Disease