Iris sibirica

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 (including France, Italy, Switzerland, Austria, Czech Republic, Slovakia, Germany, Hungary, Poland, Romania, Bulgaria, Former Yugoslavia, Belarus, Estonia, Latvia, Lithuania, Moldova, Ukraine and northern Turkey) and Central Asia (including Armenia, Azerbaijan and Siberia). 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.