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''Iris delavayi'' is a species in the genus ''Iris'', also the subgenus of ''Limniris'' and in the ''Iris series Sibiricae''. It is a rhizomatous herbaceous perennial, from various provinces in China. It has grey-green leaves, long hollow stem, and 2 flowers in various blue shades. From dark violet, dark purple, purple-blue, dark blue to light purple. It is cultivated as an ornamental plant in temperate regions. ==Description== ''Iris delavayi'' is larger and more vigorous in growth than ''Iris sibirica''.〔 It has stout, creeping rhizomes (about 1 cm in diameter), that create clumps or tufts of plants.〔〔〔〔〔〔British Iris Society (1997) 〕 It eventually forms clumps that are about wide.〔 The rhizomes have fibers (the remains of leaves from last season).〔 It has 3-4 (per stem) grey-green leaves, that are sword-shaped or linear (in form), measuring long and 0.6-1.5 cm wide.〔〔〔〔〔〔 The leaves are shorter than the flowering stems.〔〔〔 It has a hollow, 1-3 branched flowering stem that grows up to between long and 5-7mm wide.〔〔〔〔〔〔〔〔〔〔 The short branches are close to the tops of the stems.〔〔 The stem has 2-3 green, with a slight reddish purple tinge, lanceolate (sword-like), spathes (leaves of the flower bud), which measure 7–11 cm long and 1.8–2 cm wide.〔 They also have a papery brown tip.〔〔 The spathes surround 2 flowers (per stem branch), borne in early summer,〔〔〔〔 between May and August (or June or July in the UK).〔〔 The flowers come in a range of blue shades.〔 From dark violet,〔〔〔 dark purple,〔〔〔 purple-blue,〔〔 dark blue.〔〔 light purple,〔〔〔 to light blue.〔 The flowers are in diameter.〔〔〔 Like other Irises, 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 falls are obovate, measuring 7 cm long and 3 cm wide, with white or yellow signal patch or mottled pattern on the blade (wide section).〔〔〔〔〔〔〔〔〔〔 The smaller standards are held at an oblique angle, measuring 5.5 cm long and oblanceolate (in from).〔〔〔〔〔 It has perianth tube of 1.6-1.8 cm long, a pedical (flower stalk stem) of between 3–6 cm long and pale purple style branches, measuring 5 cm long and 1.6 cm wide.〔 It has a 3–6 cm long pedicel, 1.8–2 cm long and 7mm wide, ovary and milky yellow anthers.〔 Between August and October (after the iris has flowered), it produces a seed capsule, which are ellipsoid/cylindric in form and measures 5-6.5 cm long and 1.5-2.5 cm wide.〔 Inside are semi-orbicular, flat, (disc like) reddish brown seeds, with are about 6mm in diameter.〔 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 delavayi」の詳細全文を読む スポンサード リンク
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