Ceratostomella Ulmi is a fungal disease that affects Elm trees. The disease is caused by a fungus that attacks the bark, causing it to peel off and exposing the inner layers of the tree. This can result in the death of the tree if left untreated. There are several synonyms for Ceratostomella Ulmi, including Dutch Elm Disease, Elm Bark Disease, and Ulmus Endangering Syndrome. These terms are often used interchangeably to refer to the same disease. It is important for homeowners and tree care professionals to be familiar with these synonyms in order to identify and treat the disease early and effectively.