Phyllachorales is a taxonomic order of fungi primarily characterized by their rust-like, orange to reddish-brown, erumpent pustules on host plant surfaces, with septate, branched, dark brown to black conidia produced in locular, flask-shaped conidiomata called pycnidia. These fungi are predominantly plant pathogens, causing various diseases such as leaf spots and rusts in a wide range of hosts, including both monocotyledonous and dicotyledonous plants.