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}} ''Iris sibirica'' is a species in the genus ''Iris''. It is a rhizomatous herbaceous perennial, from Europe (including France, Italy, Switzerland, Austria, Czechoslovakia, Germany, Hungary, Poland, Romania, Bulgaria, Former Yugoslavia, Belarus, Estonia, Latvia, Lithuania, Moldova, Ukraine and northern Turkey) and Central Asia (including Armenia, Azerbaijan and Siberia (of the Russia Federation)). 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. ==Description== ''Iris sibirica'' was often confused with ''Iris sanguinea'', another blue flowering Asian iris. But sanguinea has unbranched stems, while sibirica has branched stems.〔 It has creeping rhizome (approximately diameter), forming a dense clumping plant.〔〔〔〔Richard Lynch 〕 The rhizomes are covered with the brown remnants of old leaves, from previous seasons.〔〔 It has green grass-like leaves,〔〔〔 which are ribbed and can sometimes have a pink tinge at the base of the leaf.〔〔 They can grow to between long and wide, normally shorter than the flowering stems.〔〔〔〔〔〔 In Autumn, the foliage turns yellow and then dies back (in winter), to re-emerge in the spring.〔〔〔 It has a hollow,〔 slender, 1–3 branched stem, that grows up to between long.〔〔〔〔〔〔〔〔〔〔〔〔〔〔〔〔 The stems bear 2-5 (normally three) flowers, at the terminal ends between late spring and early summer, between May and June.〔〔〔〔〔〔〔〔〔〔〔〔 It has 3 brown paper-like spathes (leaves of the flower bud), that are reddish at the base, measuring between long.〔〔〔〔 The flowers come in a range of blue shades.〔 From violet-blue,〔〔〔〔〔〔〔〔〔〔〔 to blue,〔〔〔〔 and occasionally white.〔〔〔〔〔〔〔〔〔 The flowers are in diameter.〔〔〔〔 It has 2 pairs of petals, 3 large sepals (outer petals), known as the 'falls' and 3 inner, smaller petals (or tepals, known as the 'standards'.〔 The drooping obovate falls, measuring 5-7.5 cm long and 2–2.5 cm wide, have a wide (or flaring) white blade or signal (central part of the petal) with dark-blue to violet veining.〔〔〔〔〔〔〔 The white forms of the iris have a tinge of lavender and dark veining.〔 The smaller narrow upright standards are between 4.5–5.5 cm long and 1.5–1.8 cm wide.〔〔〔〔 It has a light to dark blue-violet, circular perianth tube, about 1 cm long, pale blue style (about 4–5 cm long), a pedicel between 1–15 cm long and a 1.5–2 cm roundly triangular, ovary.〔〔〔 After the iris has flowered, it produces a short stubby seed capsule,〔〔 which is roundly triangular with low ridges at angles, measuring 3-4.5 cm by 1-1.3 cm.〔〔〔 Inside the capsule, are 2 rows of seeds, which are thin, flat, shaped like a capital D and dark brown seeds, measuring about 5 mm by 3 mm.〔〔 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Iris sibirica」の詳細全文を読む スポンサード リンク
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