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}} ''Iris hookeriana'' is a species in the genus ''Iris'', it is also in the subgenus of Iris and in the ''Pseudoregelia section''. It is a rhizomatous perennial, from the Himalayan mountains of India and Pakistan. It has long pale green or yellow green leaves, long slender stem and fragrant blue, purple or lilac flowers, that are mottled with a darker colour. It is cultivated as an ornamental plant in temperate regions. ==Description== ''Iris hookeriana'' is very similar in form to ''Iris kemaonensis'' (another ''Pseudoregelia Iris''), but has slender rhizomes, long stem and short perianth tube. But both have mottled flowers and have similar cultivation needs. It has a slender, fleshy and knobbly (or gnarled) rhizomes,〔〔(【引用サイトリンク】url=http://www.efloras.org/florataxon.aspx?flora_id=5&taxon_id=240010013 )〕 that are light brown.〔 They are similar in form to ''Iris tectorum''.〔 Underneath it has slender secondary roots.〔〔(【引用サイトリンク】url=http://irisbotanique.over-blog.com/ )〕 It has linear and pale green,〔 or yellow-green leaves,〔 that can grow up to between long,〔(【引用サイトリンク】url=http://www.flowersofindia.net/catalog/slides/Hooker's%20Iris.html )〕〔James Cullen, Sabina G. Knees, H. Suzanne Cubey (Editors) 〕 and between 1 and 2.5 cm wide.〔〔〔 They are semi-evergreen,〔 and have rounded tips.〔 They are the tallest within the ''Pseudoregelia Iris'' series.〔 It has a slender stem (or peduncle), that can grow up to between tall.〔 Very occasionally, they can reach 30 cm tall.〔〔〔 The stem has 3 green,〔 membranous,〔 spathes (leaves of the flower bud). They are long,〔〔 and wider than the main leaves.〔 They can remain on the plant after the bloom has died.〔 The stems hold 2 terminal (top of stem) flowers,〔〔 blooming in late spring,〔 between April and May (in Europe),〔 and between June and July.〔〔 It has very short pedicels (flower stalks).〔〔〔 They sometimes can bloom for only 2 days.〔 The fragrant flowers,〔〔〔 come in shades of purple or blue,〔〔〔 or lilac.〔〔〔 Occasionally, there is a white form.〔 They have darker blotches.〔〔〔 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 falls are obovate or oblong shaped,〔 long,〔 and 2 cm wide.〔〔 It has an oblong blade, which has a central white beard,〔 that has coloured (orange,〔 or yellow,〔) tips.〔〔 The standards are erect, clawed and obovate shaped.〔 They are long, with an oblong blade.〔〔〔 They are not blotched.〔 It has a short perianth tube,〔 that is long,〔〔〔 and green with purple stripe,〔 or spots.〔 The Stigma (botany)#Style branch is similarly coloured as the falls and standards, but is curved inwards.〔〔 It has blue filaments and creamy-white anthers.〔〔〔 The pollen is also white.〔 The white stigma is notched,〔 or serrated.〔 After the iris has flowered, it produces a trigonal,〔 or elliptic seed capsule,〔〔 is long.〔〔〔 It has a beak (curved ending).〔〔〔 It splits (or dehisces),〔 below the beak.〔 Inside the capsule are pyriform (pear) shaped seeds, that are red with a yellowish aril (appendage).〔〔〔 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 hookeriana」の詳細全文を読む スポンサード リンク
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