Class Tiliomycetes is a group of fungi that is also known as the rust fungi. These fungi infect plants and cause significant damage to crops and other vegetation. There are several synonyms for Tiliomycetes, including Pucciniomycetes, Urediniomycetes, and Cronartiaceae. These terms are often used interchangeably to describe the same group of fungi. Rust fungi are known for their distinctive orange, brown, or black spores that appear on the leaves and stems of affected plants. They can cause stunted growth, reduced yield, and even death in some cases. Understanding the various synonyms for Tiliomycetes can help researchers and other professionals better identify and manage the threat posed by these harmful fungi.