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Iris giganticaerulea
Blue Iris at Jean Lafitte Barataria Unit (cropped).jpg
Wild blue iris sprouting in swamp at Barataria Preserve, Louisiana
Preservation status

Helpless (NatureServe)
Logical classificationedit
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Monocots
Order: Asparagales
Family: Iridaceae
Genus: Iris
Subgenus: Iris subg. Limniris
Section: Iris group. Limniris
Series: Iris ser. Hexagonae
Species: I. giganticaerulea
Binomial name
Iris giganticaerulea
Iris aurilinea Alexander
Iris citricristata Small
Iris elephantina Small
Iris fluviatilis Small
Iris hexagona var. giganticaerulea (Small) R.C.Foster
Iris miraculosa Small
Iris venulosa Alexander
Iris wherryana Small
Limniris giganticaerulea (Small) Rodion.
Iris giganticaerulea, the monster blue iris, is a types of iris, in the subgenus Limniris, in the series Hexagonae. It is a rhizomatous lasting, from northern America. It has long dazzling green leaves, exceptionally tall stems and a couple of musky fragrant blossoms in a scope of blue shades (pale, brilliant, dim, lavender and violet) or seldom white.

1 Description
1.1 Genetics
2 Taxonomy
3 Distribution and living space
3.1 Range
4 Cultivation
5 Hybrids
6 References
7 Sources
8 External connections
Iris giganticaerulea (the goliath blue iris) is the biggest types of the Louisiana irises.[2][3]

It has exceptionally enormous green rhizomes, which are somewhere in the range of 5 and 12 inches (13 – 30 cm) long and 0.75 to 1.5 inches (2-4 cm) thick.[4][5] They are shallow established, set apart with the scars (of the past seasons) leaves, with many branches, which can shape a huge cluster/province growing up to 6 x 3 feet (182 x 91 cm).[5][6][2]

Ascending from the plant’s base are four to six dazzling green leaves, ensiform (sword molded) and somewhere in the range of 20 and 30 inches (50-76 cm) long, 1.5 inches (4 cm) wide.[6][7][8]

It has extremely tall stems, that can develop between to between 28 – 71 inches (70-180 cm) tall.[4][7][9] They have a few branches,[5] with a couple of terminal blossoms transcending the leaves.[2][5] There might be up to twelve blossoms on the plant.[8]

It sprouts from right on time to mid spring, in the UK and America,[3][5] with musky flowers.[2][6]

It arrives in a scope of blue shades,[3] from pale blue,[2][4][5] to lavender blue,[2][3][10] to dazzling blue,[6][7][10] to dull blue,[4][9][11] and to violet blue.[2][4][6] Occasionally there is a white form,[3][4][8] or yellowish white.[2]

The blossoms are by and large 5 to 6 inches (13 to 15 cm) across.[4][6][10] They have six petals, three external sepals (called the falls), which are erupting (1.75 inch or 4 cm wide), curve descending and have a white or yellow or weak orange sign fix or ridge.[2][4][7] They additionally have three internal sepals (called the principles), which are marginally erect or upstanding and smaller than the falls.[2][7][8]

It has a 4-5 cm long perianth tube, blue-violet style 1.3-1.5 inch (3.5-4 cm long) and two-lobed stigmae.[5]

Subsequent to blooming, it has dazzling green ellipsoid cases 3-4 inches (7-10 cm) long by 1 inch (3 cm) wide, which are hexagonal in cross area and formed like a D.[5][12]

Hereditary qualities
As most irises are diploid, they have two arrangements of chromosomes. This reality can be utilized to distinguish half and halves and arrangement of groupings.[3] It has a chromosome count of 2n=44.[4][5][11] It has been counted a few times 2n=44, Randolph 1934 (ex Randolph and Mitra in Bulletin of the American Iris Society 140, in 1956) 2n=44 Riley 1942, 2n=42, R C Foster 1937 (as Iris hexagona var. giganticaerulea)[13] and 2n=44, Randolph, 1966.[12]

Scientific classification
It has the normal name of Giant blue iris,[7][14][15] or Giant blue flag.[4][6][9] Note, the blue banner is ordinarily Iris virginica.

It was first distributed and depicted by Small (of the New York Botanical Garden,[10]) in ‘Addisonia’ in 1929.[16]

In 1937, Foster idea that it was an assortment of Iris hexagona and renamed it Iris hexagona var. giganticaerulea.[13] In 1966, Randolph re-surveyed it and arranged it as a different species.[12][17]

Somewhere in the range of 1950 and 1990, a huge contention was pursued over the state blossom of Louisiana. Then, at that point, a trade off was reached by which the Southern magnolia turned into the state blossom and the goliath blue iris the state wildflower.[18][19][20]

It was checked by United States Department of Agriculture and the Agricultural Research Service on 4 April 2003, and afterward refreshed on 2 December 2004.[21]

Dispersion and environment
It is local to northern America.[21]

Iris giganticaerulea is local to Alabama, Louisiana,[2][3][4] (on the west edge of Mississippi River), eastern Texas,[2][6][10] and Mississippi in the United States.[5][11]

This contracted reach is because of restricted toughness of the species.[10]

It fills in shallow freshwater, inside side of the road ditches, clearings inside swamps (counting cypress swamps,[10]), wet knolls and marshes.[5][9][2] It is open minded toward bitter water.[2][4]


Goliath Blue Iris Seeds
The Louisiana irises commonly all have comparable development prerequisites, with minor contrasts. They need full daylight or fractional shade, sodden, acidic soils (ph level of 6.5) with a high natural and high fruitfulness content (or humus rich).[6][22][23]

For best blooming, dampness is fundamental during late fall, winter and spring times (between October to May), when the plant begins to become new leaves.[24] They can be given a light feed among harvest time and spring, if needed.[22][23]

Engendering is best completed by division of the rhizomes.[24][25][26] Which is best done in early fall or late-winter, when the plants are torpid. The ground should be arranged pre-planting, with the expansion of a liberal measure of natural matter and the dirts burrowed to around 6 inches down (to consider new root development). Plants require partitioning each 3-4 years to advance great blossoming. They can consolidate with different plants however tend to ‘move’ to reasonable positions.[6][22][23]

In the case of utilizing a compost, sprinkle around the plant in late January or February, before the plant is in flower.[22][23][24]

New plantings should be mulched to forestall sun-scalding.[22][23] It is likewise prescribed to be added to during winter.[6]

The iris seed isn’t difficult to raise however an extremely sluggish process.[25] It can require numerous months to develop (between 3 a year) with a half germination average.[23] They then, at that point, can require 3-5 years prior to arriving at blossoming stage.[25]

Seeds ought to be collected from the plant subsequent to blooming yet they should be from mature seed units. They then, at that point, should be put away in paper packs, as seed put away in glass holders frequently goes mouldy.[23]

Iris giganticaerulea and Iris hexagona are viewed as excessively delicate for development in the UK.[8][27] Since it needs wet corrosive soils, with warm summers and milder winters.[27]

It is tough to USDA Zone 7 to 11 (or 5 and 6 whenever ensured during the winter).[4][6]

It is regularly accessible at water garden centres.[4]

Cross breeds
Iris giganticaerulea can undoubtedly hybridize with other Louisiana irises to make new variations.

A few American nursery nurseries and establish raisers have made numerous Iris giganticaerulea cultivars including, ‘Holy messenger Wings’, ‘Atrocyanea’, ‘Barbara Elaine Taylor’, ‘Marsh Barataria’, ‘Straight Boeuf’, ‘Narrows St John’, ‘Bette Lee’, ‘Billy Mac’, ‘Biloxi’, ‘Cameron White’, ‘China Blue’, ‘Citricristata’, ‘Citricristata Alba’, ‘Citriviola’, ‘Coteau Holmes’, ‘Creole Can-Can’, ‘Easter Surprise’, ‘Elephantina’, ‘Fervor’, ‘Florence Zacharie’, ‘Gentilly Road’, ‘Gheen’s White’, ‘Giganticaerulea Alba’, ‘Giganticaerulea Royal’, ‘Bay Mist’, ‘Her Highness’, ‘High Hat’, ‘Iberville’, ‘Isle Bonne’, ‘Joe Mac’, ‘Kildea’, ‘La Bahia ‘, ‘Lafitte’, ‘La Premiere’, ‘Giggling Water’, ‘Sluggish Day’, ‘Longfellow’s Gabriel’, ‘Mandeville’, ‘Miraculosa’, ‘Paludicola’, ‘Ruth Holleyman’, ‘Silverblu ‘, ‘Snow Flag’, ‘Snow Goose’, ‘Southern Accent’,’Spanish Fort’, ‘Trixie’.[12]

Different crosses incorporate with Iris fulva to deliver ‘Iris × vinicolor’ Small.[5]

^ “Iris giganticaerulea Small is an accepted name”. 23 March 2013. Retrieved 27 November 2014.
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a b c d e f g h i j k l m n “Iris giganticaerulea”. Retrieved 27 November 2014.
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a b c d e f g Austin, Claire (2005). Irises: A Gardener’s Encyclopedia. Timber Press, Incorporated. ISBN 978-0881927306. OL 8176432M.}
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a b c d e f g h i j k l m n Kramb, D. (20 September 2004). “Iris giganticaerulea”. (Species Iris Group of North America). Retrieved 5 December 2014.
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a b c d e f g h i j k l “FNA Vol. 26 Page 394”. Retrieved 28 November 2014.
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a b c d e f g h i j k l “Iris”. 13 February 2010. Retrieved 10 December 2014.
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a b c d e f “Iris giganticaerulea”. Retrieved 28 November 2014.
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a b c d e Cassidy, George E.; Linnegar, Sidney (1987). Growing Irises (Revised ed.). Bromley: Christopher Helm. p. 146. ISBN 978-0-88192-089-5.
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a b c d Brzuszek, Robert F. (21 August 2014). “Louisiana Iris in the Home Landscape”. Retrieved 27 November 2014.
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a b c d e f g Dillard, Tom W. “FROM NEW ORLEANS TO NEW ZEALAND, History and Development of The Louisiana Irises”. Retrieved 28 November 2014.
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a b c “Iris summary” (PDF). 14 April 2014. Retrieved 28 November 2014.
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a b c d Laurin, Terry (19 August 2014). “(SPEC) Iris giganticaerulea Small”. Retrieved 28 November 2014.
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a b Riley, Herbert Parkes (December 1938). “A Character Analysis of Colonies of Iris Fulva, Iris Hexagona Var. Giganticaerulea and Natural Hybrids”. American Journal of Botany. Botanical Society of America. 25 (10): 727–738. doi:10.2307/2436599. JSTOR 2436599.
^ “Iris giganticaerulea”. Retrieved 28 November 2014.
^ “PLANT CHECKLIST”. Retrieved 10 December 2014.
^ “Iridaceae Iris giganticaerulea Small”. (International Plant Names Index). Retrieved 27 November 2014.
^ Mary A.Hood Ecotravel on the World’s Rivers&pg=PA38 _vmOwmSh12YC, p. 38, at Google Books
^ “Louisiana Laws: RS 49:154.1”. Retrieved 28 November 2014.
^ “LOUISIANA LAGNIAPPE”. 2014. Retrieved 1 December 2014.
^ Mary A.Hood Ecotravel on the World’s Rivers&pg=PA38 _vmOwmSh12YC, p. 38, at Google Books
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a b “Iris giganticaerulea”. Germplasm Resources Information Network (GRIN). Agricultural Research Service (ARS), United States Department of Agriculture (USDA). Retrieved 5 August 2015.
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a b c d e Gill, Dan; Owings, Allen (1969). “Louisiana Iris” (PDF). Louisiana State University. Retrieved 7 December 2014.
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a b c d e f g Helen Nash Guide to Water Garden Plants ssKzSCtgyZ8C at Google Books
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a b c Neil G. Odenwald and James R. Turner Selection, and Use of Southern Plants: For Landscape Design&pg=PA316 S__s1QADDJoC, p. 316, at Google Books
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a b c Nick Romanowski Garden Plants & Animals: The Complete Guide for All Australia gQsVgaxl-9kC at Google Books
^ Gill, Dan (9 August 2006). “Get It Growing: It’s Time To Divide Louisiana Irises Get It Growing News”. Retrieved 8 December 2014.
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a b Stebbings, Geoff (1997). The Gardener’s Guide to Growing Irises. Newton Abbot: David and Charles. p. 18. ISBN 978-0715305393.
British Iris Society, A Guide to Species Irises: Their Identification and Cultivation (1997)