Fosteria is a monotypic bulbous genus in the Iridaceae family native to Oaxaca, Mexico. It is in the Tigridieae tribe. Goldblatt & Manning have decided to lump Fosteria in with Tigridia in their new book The Iris Family (2008).
Fosteria oaxacana if the lumping is accepted will now be known as Tigridia oaxacana.