Iris odaesanensis

Iris odaesanensis
Scientific classification
Kingdom: Plantae
(unranked): Angiosperms
(unranked): Monocots
Order: Asparagales
Family: Iridaceae
Subfamily: Iridoideae
Tribe: Irideae
Genus: Iris
Subgenus: Limniris
Series: Iris series Chinenses
Species: I. odaesanensis
Binomial name
Iris odaesanensis
Y.N.Lee
Synonyms
  • Iris koreana f. albiflora T.H.Chung & T.Lee
  • Iris odaesanensis f. purpurascens Y.N.Lee
  • Limniris odaesanensis (Y.N.Lee) Rodion.[1]

Iris odaesanensis is a beardless iris in the genus Iris, in the subgenus Limniris and in the Chinenses series of the species. It is a rhizomatous herbaceous perennial from China and eastern Korea. It has blue-green grass-like leaves, short stem, 1 or 2 fragrant, white or off-white flowers in spring to early summer. It is a rare plant in the wild, but it is cultivated in east Asia.

Description

Iris odaesanensis growth is more vigorous than Iris minutoaurea and Iris koreana.[2]

It has small, slender rhizome measuring about 1 centimetre long and 0.5 centimetres wide (0.4 in × 0.2 in), it spreads by growing many stolons or branches.[3][4][5][6] Under the rhizome, are secondary roots growing into the soil, looking for nutrients.[2] These roots have small nodules on them.[7] These are used to fix nitrogen, from the soil.[8]

It has glaucous (blue-green), grass-like leaves.[9][10][5] They are sword-shaped (ending in a point),.[11] and measure between 10–25 cm (4–10 in) long and 0.5–1.1 cm (0.20–0.43 in) wide.[3][4][5][12] They then elongate after flowering, up to 35 cm (13.8 in) long. It also has many midribs, along the length.[3][4]

It has short, flowering stems (or scapes) 9–13 cm (3.5–5.1 in).[9][13][3][4][2][5][7][14][15][16] It has one or two terminal (at the top of the stem) flower,[4][5][12] in spring to early summer,[14][17] between April or June.[3][4][4][11][2]

It has 2 lanceolate (lance-like) 3.3–6.2 cm (1.3–2.4 in) long and 0.1–0.4 cm (0.039–0.157 in) wide, spathes (leaves of the flower bud).[4]

The small fragrant, flowers are 3–4 cm (1–2 in) in diameter,[4][2][5] and white or off-white.[3][5][14][6][18]

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'.[3][19] The falls are obovate (egg-like), 1.8–2.4 cm (0.71–0.94 in) long and 1–1.6 cm (0.39–0.63 in) wide, with a central yellow signal patch, spreading towards the centre of the flower.[9][10][4][11][2][5][7][17][12][15]

The smaller, paler (in colour) narrow, standards (held at an angle) are between 1.8–2.4 cm (1–1 in) long and 1–1.6 cm (0–1 in) wide.[4][12][15]

It has a long pedical, short (1-5mm) perianth tube, 1-1,4 cm long stamens and white, linear, 1.5–2 cm (1–1 in) long and 0.3–0.4 cm (0–0 in) wide.[4]

It has 3 stamens, 3-lobed petal-like stigma, smaller ovary.[3] and a green tinged with pink anther.[12]

After the iris has flowered, it produces an ovoid shaped, with 3 angles, seed capsule (between 2.3–2.7 cm (1–1 in) long and 1.2–1.5 cm (0–1 in) wide) between June and August.[3][4][18] Within the capsule are small boat-shaped seed.[3]

Biochemistry

The chemical composition of the iris was studied and it was found that it contains starch and fat oil.[3]

As most irises are diploid, having two sets of chromosomes. This can be used to identify hybrids and classification of groupings.[19] It was counted as 2n=22[2][20]

Taxonomy

It has the common name of 'Mt. Odae Iris' in America.[21][9][10][13] It is very occasionally known as the 'Korean White Iris'.[3]

It is written as 朝鲜 鸢 尾 in Chinese script and known as chao xian wei yuan in China.[4]

It is written as 노랑무늬붓꽃 in Korean script.[22]

The Latin specific epithet odaesanensis, comes from the word “odaesan” because it was first discovered in Odaesan Mountain in Korea.[11][2]

It is firstly found on 'Mount Omi' in the Korean province of Gyeongsangbuk-do in 1963. It was originally called Iris koreana for. albiflora (T.H.Chung & T.Lee, Report on study of a new species of Iridaceae plants Seoul Agricultural College 1-4 1964). Later, in 1974, Y.N.Lee found the same species on both Mt. Odae and Mt Hoenggye-ri in Gangwon province but named it as 'Iris odaesanensis'.[23]

It was then first published and described as Iris odaeanensis by Y.N.Lee in the 'Korean Journal of Botany', Vol.17 Issue.33, in 1974.[24]

It was later published in Illustrated Flora and Fauna of Korea, Vol.18 in 1976.[5]

It was verified by United States Department of Agriculture Agricultural Research Service on 4 April 2003.[25]

Distribution and habitat

Iris odaesanensis is native to the temperate regions of eastern Asia.[25]

Range

It is found in Jilin, China[4][25] and eastern Korea.[9][10][13][3][4][7][25][20]

It is listed as being found in the Korean Demilitarized Zone (between North Korea and South Korea).[26]

Habitat

It grows in the forest margins,[16] mountain meadows and in damp hillsides along ditches.[3][4][11][6]

At altitudes of about 1,500 metres (4,900 ft) above sea level.[4]

Conservation

In the 1997 IUCN Red List of Threatened Plants, it was classified as rare – from South Korea (Mt Odae and Mount Sorak and Mt Kyebang).[27]

Since 2006, it has been found that the populations of the iris have been in rapid decline so now rare.[2] So it was then designated as threatened by extinction, and listed as Grade II for preservation.[11][23]

In 2006, a patent for the method of mass propagation of Iris odaesanensis was issued. To help preserve and propagate the endangered Iris.[28]

The Hantaek Botanical Garden grows 12 species for conservation and restoration, these include Rodgersia tabularis, Crypsinus hastatus, Wasabia koreana, Jeffersonia dubia, Iris odaesanensis, Iris dichotoma, Hylotelephium ussuriense, Abeliophyllum distichum, Brasenia purpurea, Paeonia obovata, Thalictrum coreanum and Corylopsis coreana.[29]

In 2012, the vascular plants of the Jusan Reservoir Watershed in Juwangsan National Park, Korea were studied and 2 species were designated by Ministry of Environment as endangered plants; Berchemia berchemiaefolia (Makino) Koidz. and Iris odaesanensis Y.N.Lee.[30]

In 2014, a study of the vascular plants along the altitudinal gradient and investigation routes of Gyebangsan (Mt.) in Korea. Out of all the 510 surveyed taxonomic groups, the rare and endangered plants constituted 24 taxa in total. Only one taxon was classified as 'Endangered' species (EN), Oplopanax elatus and vulnerable species (VU) included Picea jezoensis, Thuja koraiensis and Iris odaesanensis.[22]

Cultivation

Iris odaesanensis is hardy to between USDA Zone 5 – 9.[9][13][14]

It prefers well drained, (mildly acidic - neutral) soils and in positions between partly sunny to light shade (similar to woodland positions).[9][10][13][14][17][6] It will tolerate up to 6 hours of sun as well.[31]

It likes soils that get an average amount of moisture.[9][14] But it will tolerate temporary drought conditions.[2]

It is rare in cultivation in the USA and only available in very few nurseries.[9][7]

It is thought to be easy to cultivate even in moderately shaded areas of Korea and Japan.[17] It is sometimes used as a ground covering plant.[2]

It can be seen in JC Raulston Arboretum of the North Carolina State University since 2012.[32]

It flowered in the Cumberland woodland garden of Kew Botanical Garden in the UK in May 1997. This was the first known record of it flowering in cultivation in the UK.[33]

Propagation

Iris odaesanensis can be naturally propagated by hummingbirds.[9][2]

It can also be propagated by division or by seed growing.[14]

Dividing the clump is the easiest, (separating the small sections of rhizomes), as the plant can create dense clumps within 5 years of planting.[2][23]

To grow by seed, the seed pod has to be harvested when ripe.[14] But this must be timed perfectly, or the seeds will be lost.[18] The seeds can suffer from poor germination rates or cross-pollination (with other iris species).[23]

It also takes a long time to grow and to form flower producing plants, they can take up to 5 years to get big enough to produce flowering stems.[23]

Hybrids and Cultivars

Known varieties include;

Toxicity

Like many other irises, most parts of the plant are poisonous (rhizome and leaves), if mistakenly ingested can cause stomach pains and vomiting. Also handling the plant may cause a skin irritation or an allergic reaction.[2][14][35]

Culture

In 1995, a Korean postage stamp features Iris odaesanensis.[7]

References

  1. "Iris odaesanensis Y.N.Lee is an accepted name". theplantlist.org (The Plant List. 23 March 2012. Retrieved 9 January 2015.
  2. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 "Chapitre II iris a touffe et autre (partie1)". irisbotanique.over-blog.com. Retrieved 8 January 2015.
  3. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 "Iris odaesanensis Y. Lee". minsok.jbnu.ac.kr. Retrieved 10 January 2015.
  4. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 "FOC Vol. 24 Page 303". efloras.org (Flora of China). Retrieved 8 January 2015.
  5. 1 2 3 4 5 6 7 8 9 Laurin, Terry (21 October 2014). "(SPEC) Iris odaesanensis Lee". irises.org (American Iris Society). Retrieved 8 January 2015.
  6. 1 2 3 4 "Canadian Iris Society Newsletter Winter 2013 Vol.57 Issue1" (PDF). e-clipse.ca. p. 12. Retrieved 10 January 2015.
  7. 1 2 3 4 5 6 Kramb, D. (30 September 2004). "Iris odaesanensis". signa.org (Species Iris Group of North America). Retrieved 8 January 2015.
  8. "The Planzengattung Iris". orchideenkultur.net. Retrieved 8 January 2015.
  9. 1 2 3 4 5 6 7 8 9 10 "Iris odaesanensis". putnamhillnursery.com. Retrieved 10 January 2015.
  10. 1 2 3 4 5 "Catalog I.". laporteavenuenursery.com. Retrieved 10 January 2015.
  11. 1 2 3 4 5 6 "Flagship Species". english.knps.or.kr. Retrieved 8 January 2015.
  12. 1 2 3 4 5 "Yellow Iris". blog.daum.net. 5 March 2014. Retrieved 8 January 2015.
  13. 1 2 3 4 5 "Iris odaesanensis (Mt. Odae Iris)". plantdelights.com. Retrieved 10 January 2015.
  14. 1 2 3 4 5 6 7 8 9 "PlantFiles: Species Iris Iris odaesanensis". davesgarden.com. Retrieved 8 January 2015.
  15. 1 2 3 "Iris summary" (pdf). pacificbulbsociety.org. 14 April 2014. Retrieved 23 November 2014.
  16. 1 2 Min-Ho, Son (21 June 2014). "Wandering in a wildflower wonderland". koreajoongangdaily.joins.com. Retrieved 8 January 2015.
  17. 1 2 3 4 Gin, Emma. "Korean Flower Names". gardenguides.com. Retrieved 8 January 2015.
  18. 1 2 3 "SPRING NEWSLETTER, APRIL 2007" (PDF). glcnargs.com (GREAT LAKES CHAPTER, North American Rock Garden Society). April 2007. p. 6. Retrieved 8 January 2015.
  19. 1 2 Austin, Claire. "Irises A Garden Encyclopedia" (pdf). worldtracker.org. pp. 274–275. Retrieved 29 October 2014.
  20. 1 2 Park, Young Wook; Kim, Dong Min; Jung, Hwang Yoon; Lim, Ki Byung; Kim, Hyun Hee. "Karyotype analysis of three Korean native Iris species.". Horticulture, Environment and Biotechnology. horticulture.or.kr/eng. 47 (1). Retrieved 10 January 2015.
  21. "The Woodland Hillside" (PDF). highpoint.edu High Point University. Retrieved 10 January 2015.
  22. 1 2 Yang, Jong-Cheol; Hwang, Hee-Suk; Lee, Hye-Jeong; Jung, Su-Young; Ji, Seong-Jin; Lee, You-Mi (30 March 2014). "Distribution of vascular plants along the altitudinal gradient of Gyebangsan (Mt.) in Korea". Journal of Asia-Pacific Biodiversity. 7 (1): 40–71. doi:10.1016/j.japb.2014.03.008. Retrieved 10 January 2015.
  23. 1 2 3 4 5 Bae, Kee-Hwa; Yoo, Kyoung-Hwa; Lee, Mi-Hyun; Jeong, Jae-Hun; Choi, Yong-Eui; Yoon, Eui-Soo (12 September 2013). "Plant regeneration from callus of Iris odaesanensis Y. N. Lee native to Korea via organogenesis" (PDF). Journal Plant Biotechnology. Korean Society for Plant Biotechnology. 40: 163–168. doi:10.5010/JPB.2013.40.3.163. Retrieved 8 January 2015.
  24. "Iridaceae Iris odaesanensis Y.N.Lee". ipni.org (International Plant Names Index). Retrieved 6 January 2015.
  25. 1 2 3 4 "Taxon: Iris odaesanensis Y. N. Lee". ars-grin.gov (Germplasm Resources Information Network). Retrieved 8 January 2015.
  26. Kim, Jin-Oh; Fuller, Trevon (2007). "Incorporating Stakeholder Preferences into Transboundary Conservation Planning: A Case Study from the Korean Demilitarized Zone" (PDF). Endangered Species Update, Science, Policy and emerging issues. School of Natural Resources and Environment, THE UNIVERSITY OF MICHIGAN. 24 (4): 94–124. Retrieved 7 November 2014.
  27. Kerry Scott Walter and Harriet J. Gillett (Editors)XIL9adYYeSIC&pg=PA679 1997 IUCN Red List of Threatened Plants, p. 679, at Google Books
  28. Jae, Lee Sung; Kyu, Kim Hee; Yong, Shin Dong; Jun, Sim Sang; Yong, Sung Gil (29 June 2006). "The Method For Mass Propagation Of Iris Odaesanensis Y. Lee Via Embryo Genesis From Growing Point Tissue". europepmc.org. Retrieved 8 January 2015.
  29. Song, Ki Hun (July 2006). "Plant Conservation in South Korean Botanic Gardens". Botanic Garden journal. bgci.org. 3 (2). Retrieved 10 January 2015.
  30. You, Ju-Han; Jung, Sung-Cheol; Chung, Chul-Un; Mun, Sung-Ju (2012). "Management Plan and Vascular Plants of the Jusan Reservoir Watershed in Juwangsan National Park". Journal of the Korea Society of Environmental Restoration Technology. The Korea Society of Environmental Restoration Technology. 15 (1): 89–105. doi:10.13087/kosert.2012.15.1.089. Retrieved 10 January 2015.
  31. "Beardless Irises Two". pacificbulbsociety.org. 2 March 2013. Retrieved 10 January 2015.
  32. "Our Plants". jcra.ncsu.edu. Retrieved 10 January 2015.
  33. "Kew Scientist magazine Oct 1997 Issue 12" (PDF). kew.org. October 1997. p. 8. Retrieved 10 January 2015.
  34. "Iris odaesanensis 'Ice Whisper'". epimediums.com. Retrieved 10 January 2015.
  35. David G Spoerke and Susan C. SmolinskeToxicity of Houseplants, p. 236, at Google Books

Other sources

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