Iris barnumiae is a species in the genus Iris; it is also in the subgenus Iris and in the section Oncocyclus. It is a rhizomatous perennial, from Armenia, Azerbaijan, Iran, Iraq, and Turkey. It has pale glaucous green and narrow leaves, that are slightly sickle-shaped and fade soon after blooming. It has, in mid- to late spring, fragrant flowers in shades of purple, from red-purple, mulberry to purplish-violet, with a yellow tipped with purple beard. It was renamed as I. barnumiae in after a plant naming conference in 2011, but is still sometimes named as I. barnumae in some sources. It has one accepted subspecies Iris barnumiae subsp. demawendica and two forms; Iris barnumiae f. protonyma (Stapf) B.Mathew & Wendelbo and Iris barnumiae f. urmiensis (Hoog) B.Mathew & Wendelbo, which has yellow flowers. Sometimes I. barnumiae f. barnumiae is used to describe the basic form. It is rarely cultivated as an ornamental plant in temperate regions, due to its needing very dry and warm summer conditions.

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