Monotypic Iridaceae genera

Witsenia is a genus of flowering plants in the family Iridaceae, first described as a genus in 1782. There is only one known species, Witsenia maura, endemic to Cape Province in western South Africa.

Duthiastrum is a genus of plants in the Iridaceae. It contains only one species, Duthiastrum linifolium, endemic to South Africa (Cape Provinces, Free State, Northern Provinces).

Cyanixia is a genus of plants in the family of Iridaceae, first described in 2003. It contains only one known species, Cyanixia socotrana, a perennial, herbaceous and bulbous plant species endemic to the Island of Socotra in the Indian Ocean, part of the Republic of Yemen.

Savannosiphon is a flowering plant genus in the family Iridaceae, circumscribed in 1980. It contains a single species, Savannosiphon euryphylla, native to tropical Africa (Zaire, Tanzania, Malawi, Mozambique, and Zimbabwe).

Phalocallis is a genus of flowering plants in the family Iridaceae. It was first described as a genus in 1839. It contains only one recognized species, Phalocallis coelestis, native to Paraná State in southern Brazil, and also in northeastern Argentina.

Tapeinia is a monotypic genus of flowering plants in the family Iridaceae. The genus name is derived from the Greek word tapeinos, meaning "low". The single species, Tapeinia pumila, is native to Southern Chile (from Araucanía to Magallanes regions) and Argentina.

Pillansia is a genus of flowering plants in the family Iridaceae, first described as a genus in 1914. It contains only one known species, Pillansia templemannii, which is endemic to the Cape Province in South Africa.

Cobana is a genus of herbaceous, perennial and bulbous plants in the family Iridaceae. A monotypic genus, it contains a single species, Cobana guatemalensis, distributed in Honduras and Guatemala.