Iris notha is a species in the genus Iris, it is also in the subgenus Limniris and series Spuriae. It is a rhizomatous perennial with deep blue or violet flowers from the Caucasus region. It is cultivated as an ornamental plant in temperate regions. It was once Iris spuria subsp. notha, and can often be found under that name. It has the common name of fake iris or mimic iris in Russia.

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