Oudemansiella is a genus of fungi in the Physalacriaceae family. According to the Dictionary of the Fungi (10th edition, 2008), the genus contains about 15 species that are widely distributed in tropical and temperate regions. Yang and colleagues revised the genus in a 2009 publication, describing several new species and several varieties. They classified species in the genus into four sections based on the structure of the cap cuticle: Oudemansiella, Mucidula, Dactylosporina, and Radicatae.