Iris sibirica, the Siberian Iris or Siberian flag, is a species of flowering plant in the family Iridaceae, native to north east Turkey, Russia, eastern and central Europe. Growing 50–120 cm (20–47 in) tall, it is a rhizomatous herbaceous perennial. The leaves are glaucous green, narrow and fairly rigid, blade-shaped, 40–80 cm (16–31 in) long and 2–4 cm broad. The flowers are typical of an iris, borne in late spring or early summer on unbranched or sparsely-branched stems held above the...