Iris sibirica, commonly known as Siberian iris or Siberian flag, is a species of flowering plant in the family Iridaceae. It is a rhizomatous herbaceous perennial, from Europe and Central Asia. It has long green grass-like leaves, tall stem, 2–5 violet-blue, to blue, and occasionally white flowers. It is cultivated as an ornamental plant in temperate regions.

Iris sanguinea is a rhizomatous flowering plant in the genus Iris and in the series Sibiricae. It is cultivated as an ornamental plant in temperate regions. It is one of the species considered a Japanese iris. It is from Asia, found between Russia, Mongolia, China, Japan and Korea. It has grey green leaves, an unbranched flowering stem and flowers in reddish-purple shades, from blue to blue-purple, red-violet, with a rare white variant.