Oudemansiella is a genus of fungi in the family Physalacriaceae. 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.
The genus name of Oudemansiella is in honour of Corneille Antoine Jean Abram Oudemans (1825âÂÂ1906), who was a Dutch botanist and physician who specialized in fungal systematics.
The genus was circumscribed by Carlo Luigi Spegazzini in 1881.