Orthrosanthus is a genus of flowering plants in the family Iridaceae first described as a genus in 1827. It is native to Australia, Mexico, Central and South America. The genus name is derived from the Greek words orthros, meaning "morning", and anthos, meaning "flower". They are known commonly as morning irises.

Description

These are rhizomatous perennial herbs. The linear to sword-shaped leaves are arranged in a layered fan. The flowers are usually blue, except in one white-flowered species. This genus is closely related to the genus Libertia. The flowers are very similar, but Libertia flowers are usually white.