Iris tenuis (also known as Clackamas iris) is a species in the genus Iris, it is also in the subgenus of Limniris. It is a rhizomatous perennial, from North America, endemic to Oregon in the Cascade Range, in Clackamas, the small flowers are white, pale blue or lilac, with a yellow or golden low dissect crest and pale green leaves. It is cultivated as an ornamental plant in temperate regions.