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}} ''Iris cristata'' (also known as 'Dwarf Crested Iris' and 'Crested Iris') is a species in the genus ''Iris'', it is also in the subgenus of ''Limniris''. It is a rhizomatous perennial plant, endemic to the eastern United States. It has pale lavender flowers with a white patch and orange or yellow crest. It is a close relative to ''Iris lacustris'' (Dwarf lake iris), the only other crested iris native to North America. It is cultivated as an ornamental plant in temperate regions. ==Description== It has slender, greenish,〔British Iris Society (1997) 〕〔Richard Lynch 〕〔(【引用サイトリンク】url=http://irisbotanique.over-blog.com/article-chapitre-ii-iris-a-touffe-et-autre-partie3-106518511.html )〕 or whitish yellow rhizomes.〔(【引用サイトリンク】url=http://ozarkedgewildflowers.com/spring-wildflowers/crested-iris-iris-cristata/ )〕 They are shallow rooted.〔〔(【引用サイトリンク】url=http://www.fs.fed.us/wildflowers/beauty/iris/Dwarf_Woodland/iris_cristata.shtml )〕 They spread by sending out long stolons from multiple branches.〔〔〔〔(【引用サイトリンク】url=http://www.missouribotanicalgarden.org/PlantFinder/PlantFinderDetails.aspx?kempercode=k690 )〕〔James Cullen, Sabina G. Knees, H. Suzanne Cubey (Editors) 〕〔Edwin B. Smith 〕 They can have up to 2-8 cord-like branches.〔(【引用サイトリンク】url=http://www.efloras.org/florataxon.aspx?flora_id=1&taxon_id=242101698 )〕 The branches can be long and 1-2mm wide.〔〔 Under the rhizomes are fleshy-like roots.〔 The branches are brown.〔〔 The creeping habit can create large masses of plants over time.〔〔〔〔〔Nick Romanowski 〕〔Holly Kerr Forsyth (Editor) 〕 It has 6-8 basal leaves, which are divided onto 2-3 proximal (close to centre) leaves and 4-5 distal (away from centre) leaves.〔 The proximal leaves are falcate (sickle-shaped), light brown with a darker brown central mid-rib,〔 and the distal leaves are ensiform (sword-like),〔〔〔〔〔〔John Darby (1841) 〕〔(【引用サイトリンク】url=http://www.wildflower.org/plants/result.php?id_plant=IRCR )〕〔(【引用サイトリンク】url=http://www.finegardening.com/crested-iris-iris-cristata )〕 green or yellowish green, with a few visible veins.〔〔〔〔〔〔(【引用サイトリンク】url=https://www.rhs.org.uk/Plants/9229/Iris-Iris cristata/Details )〕〔(【引用サイトリンク】url=http://www.gardening.cornell.edu/homegardening/sceneeb43.html )〕 They can grow up to between long and 1-2.5 cm wide.〔〔〔〔〔〔〔〔〔〔〔(【引用サイトリンク】url=http://www.irises.org.au/crested.htm )〕 They elongate after flowering,〔〔 growing up to long.〔〔〔〔〔 The elongated leaves hide any seed pods produced later.〔 It has short stems,〔 (almost stemless),〔〔〔〔〔〔〔〔 growing up to between tall.〔 The pedicel or stem, is the same length to the ovary.〔 It has an overall height with stem and flower reaching tall.〔〔〔〔〔〔〔〔〔〔〔〔〔John Kirkegaard〕〔(【引用サイトリンク】url=http://www.americanmeadows.com/perennials/iris/dwarf-crested-iris )〕〔John Greenlee 〕 It has 2-3 cauline (on the stem), spathes (leaves of the flower bud), which are green, falcate (sickle-shaped) slightly inflated, unequal (outer leaves are shorter than the inner leaves) and lomg.〔 The spathes bear 1 or 2 flowers,〔〔〔〔〔〔〔〔 in Spring,〔〔〔〔〔 or early summer,〔〔 between April to May.〔〔〔〔〔〔〔〔〔〔 They only flower for a short time.〔〔 The fragrant,〔 flowers are in diameter,〔〔〔〔〔〔〔 and come in shades of blue,〔〔〔〔〔〔〔〔〔 from lavender,〔〔〔〔〔〔/>〔〔〔〔〔〔〔 to lilac,〔〔〔〔〔〔〔〔〔〔 to pale blue,〔〔〔〔〔〔 and purple.〔〔〔〔〔〔〔〔〔〔〔〔〔〔〔 There are occasionally white forms,〔〔〔〔〔〔〔〔〔〔〔〔〔〔〔〔 and very rarely pink forms.〔〔〔 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 spreading falls are long and 1.5-2.5 cm wide.〔〔 They have a central white signal patch, which is surrounded by a purple (or dark blue,〔) ring, with 3 parallel orange or yellow crests (or ridges).〔〔〔〔〔〔〔〔〔〔〔〔〔〔〔〔〔〔〔〔〔〔〔〔〔 The fall tapers towards the claw (close to the stem).〔〔 The standards are erect,〔 oblanceolate and long and 1–2 cm wide (narrower and shorter than the falls).〔〔〔〔〔 It has a filiform (thread-like), perianth tube that is long.〔〔〔〔 This large flower tube lifts the flower above ground level.〔〔 It has a triangular, 0.6–1 cm long ovary, an oblong stigma (half the size of the falls,〔) and 1.5 cm long, triangular crested, style branch.〔 After the iris has flowered, it produces an ovoid seed capsule.〔〔 The capsule is 1–2 cm long, with ridged angles and triangular in cross-section.〔〔 Inside the capsule, are ellipsoid, yellowish-brown seeds that are 3.2–3.5 mm across and have a white appendage that spirally wraps around the seed.〔〔 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 cristata」の詳細全文を読む スポンサード リンク
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