Libertia is a genus of monocotyledenous plants in the family Iridaceae, first described as a genus in 1824. It is native to South America, Australia, New Guinea, and New Zealand. Several of species are endemic to New Zealand. They are all perennials growing from short woody rhizomes, with simple, linear or narrowly lanceolate basal leaves which are often green but may be red or yellow depending on the species. The showy white trimerous flowers are open in spring and are followed by capsules opening by three valves which contain the numerous black seeds.