Iris subg. Iris

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Iris subg. Iris
Purple-Iris pn.jpg
Purple bearded iris
Scientific classification OOjs UI icon edit-ltr.svg
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Monocots
Order: Asparagales
Family: Iridaceae
Subfamily: Iridoideae
Tribe: Irideae
Genus: Iris
Subgenus: Iris subg. Iris
B.Mathew

Subgenus Iris is one subgenus of Iris.

Iris as a plant was originally named by Carl Linnaeus in his book Systema Naturae (in 1735), with a great number of species being added into the genus. Including new ones that were found after the book's publication. The division of irises into various subgroups, has taken various forms over the years. By the 19th century botanists had created new genera such as Evansia, Hermodactylus, Moraea, Oncocyclus, and Xiphion. Opinion was often divided whether to split the genus into several parts or lump them back into Iris. From J. G. Baker, who separated some such as Moraea and Xiphion from Iris in his book 'Handbook of the Irideae' (published in London) in 1892. Then William R. Dykes, who clarified the situation by a compromise in his monograph The Genus Iris (by Cambridge University Press, 1913; later reprinted in 1974 by Dover). He was the first to term the subgroup as Iris sect. Iris. G. Rodionenko  [ ru ]'s 1961 reclassification in The Genus Iris (written in Russian, Moscow, 1961) was more comprehensive in that he split the genus into five genera: Iris (which included all rhizomatous irises). [1] A taxonomic revision by Brian Mathew in 1981 (The iris, New York: Universe Books), recognized six subgenera: Nepalensis Dykes, Xiphium (Miller) Spach, Scorpiris Spach, Hermodactyloides Spach, Iris L. and Limniris Tausch. [2] Recently, DNA analysis has been used to determine groupings. [3]

Contents

The Iris subgenus has been divided into six sections; bearded irises (or pogon irises), Psammiris, Oncocyclus, Regelia, Hexapogon and Pseudoregelia. Sections Oncocyclus and Regelia are also called aril irises.

Section bearded irises (or pogon irises)

Close-up of the flower, showing the yellow hairs of the 'beard' Bearded Iris (8057585814).jpg
Close-up of the flower, showing the yellow hairs of the 'beard'

This is the largest section of the subgenus, the true bearded irises. Most irises come from Southern or eastern Europe. [2] 'Pogon' refers to the Greek word for beard. [4] It has several species of iris including;

Bearded iris cultivar 'Stepping Out' Iris 'Stepping out' 2007-05-13 388.jpg
Bearded iris cultivar 'Stepping Out'

It also includes thousands of ornamental plant cultivars, which have been divided into various height categories. [5]

Psammiris

This section of irises was first described by Spach. Most of the Irises come from Russia and Northwest China. Mostly rhizomatous, and flowering in late spring. [2] 'Psammiris' is derived from the Greek word psammos for sand. [4]

Iris humilis subsp. arenaria Iris humilis subsp. arenaria sl7.jpg
Iris humilis subsp. arenaria

It includes;

Oncocyclus

Iris atropurpurea from Israel IrisHaArgemanZE001.jpg
Iris atropurpurea from Israel

Oncocyclus irises are rhizomatous perennials. They also generally need rich soils that drain easy and are in full sun. Most also prefer a dry period after flowering. [7] The Oncocyclus irises are mostly from Turkey, Caucasus and Iran. The plants usually have only one flower, [2] which is veined or spotted. [8] Some of these species have been bred with bearded irises to create unique colours and markings. [2] Oncocyclus is a Greek word, with onco meaning mass, or bulk, and cyclus meaning circle. [9] In 1846, the term 'Oncocyclus' was first used by C.H. Siemssen as the Genus Oncocyclus in 1846 in Botanische Zeitung. Baker then re-classified it to a subgenus in 1877, than Dykes lowered it to a section in 1914, where it currently remains. [10]

Regelia

Iris hoogiana Iris hoogiana - Fleur.jpg
Iris hoogiana

Mostly from the mountainous regions of Iran, Afghanistan and the Altai Mountains. [11] Most irises have a stem that has 2 flowers. [2] It was named in 1904 by Robert Lynch in his book The Book of The Iris after Dr Regel. [12]

Hybrids of Regelia irises and Oncocyclus irises are known as Regelicyclous. [13]

Hexapogon

Mostly from the desert area of Central Asia, Iran and Afghanistan. Most irises have beards on the falls and standards. [2] Etymologically, hexa refers to the number 6 and pogon refers to the Greek word for beard. [4]

Pseudoregelia

Mostly from the mountainous regions of Eastern Asia. Most irises have flowers that have blotches or colour spots on. [2]

Related Research Articles

<i>Iris</i> (plant) Genus of flowering plants in the family Iridaceae

Iris is a flowering plant genus of 310 accepted species with showy flowers. As well as being the scientific name, iris is also widely used as a common name for all Iris species, as well as some belonging to other closely related genera. A common name for some species is flags, while the plants of the subgenus Scorpiris are widely known as junos, particularly in horticulture. It is a popular garden flower.

<i>Scorzonera</i> Genus of flowering plants

Scorzonera is a genus of flowering plants in the tribe Cichorieae within the family Asteraceae.

<i>Bellevalia</i> Genus of flowering plants

Bellevalia is a genus of plants in the family Asparagaceae, subfamily Scilloideae. It was first described as a genus in 1808.

<i>Jurinea</i> Genus of flowering plants

Jurinea is a genus of plants in the family Asteraceae.

<i>Iris <span style="font-style:normal;">subg.</span> Scorpiris</i> Subgenus of flowering plants

Iris subg. Scorpiris, commonly called Juno, is a subgenus of Iris, representing the smooth-bulbed bulbous irises. For a while it was an independent genus Juno Tratt. in some classifications.

<i>Iris junonia</i> Species of plant

Iris junonia is a plant species in the genus Iris, it is also in the subgenus Iris. It is a rhizomatous perennial, from Cilicia, within the Taurus Mountains. It has glaucous short leaves, tall stems with several branches, numerous flowers in various colours from blue-purple, lavender, pale blue, cream, white and yellow, with brown veining and white tipped orange beards. It is cultivated as an ornamental plant in temperate regions. Its status is still unclear, if it is a synonym of Iris germanica or a separate species.

Iris purpureobractea is a plant species in the genus Iris, it is also in the subgenus Iris. It is a rhizomatous perennial, from the cliffs and forest glades on the mountains of Turkey. It has straight or falcate shaped leaves, stem with several branches, the stem has purple spathes, it has up to 8 fragrant flowers, in various colours between yellow or blue. It is cultivated as an ornamental plant in temperate regions.

Iris taochia is a plant species in the genus Iris, it is also in the subgenus Iris. It is a rhizomatous perennial, from the Caucasus mountains and Turkey. It forms dense clumps, with grey-green leaves, simple stems of similar height, with 1–3 branches, a flowers in various shades from white, yellow to purple. They also have yellowish or white, tipped yellow beard. It is cultivated as an ornamental plant in temperate regions.

<i>Iris acutiloba <span style="font-style:normal;">subsp.</span> lineolata</i> Subspecies of flowering plant

Iris acutiloba subsp. lineolata is a species in the genus Iris, it is also in the subgenus of Iris. It is a subspecies of Iris acutiloba, and is a rhizomatous perennial, from the mountains of Iran, Turkey, Turkmenistan, Tajikistan and Azerbaijan. It has narrow, lanceolate, or falcate (sickle-shaped) leaves, which are grey-green and glaucous. It has a slender straight stem holding one terminal flower. The flowers, come in shades of white, cream, or creamy white and have veining that is purple or brown, or a mixture of both. It is heavily veined or streaked in purple or brown, with a dark purple-brown, spot on 3 of the outer petals and brown, dark purple, or black short beard. It is rarely cultivated as an ornamental plant in temperate regions, unless grown in a greenhouse.

<i>Iris acutiloba</i> Species of plant

Iris acutiloba is a species in the genus Iris, it is also in the subgenus of Iris and section Oncocyclus. It is a rhizomatous perennial, from the mountains of the Caucasus and found in Turkey, Armenia, Azerbaijan, Turkmenistan, Dagestan in the North Caucasus, and Iran. It is a dwarf species, with narrow, falcate or curved leaves, it has one flower in spring or early summer, that comes in shades from cream, creamy white, whitish, pale brown, light grey, to pale violet. It is heavily veined or streaked and pointed, with 2 dark spots and brown, purple, dark purple, or black short beard. It is cultivated as an ornamental plant in temperate regions. There are two subspecies, Iris acutiloba subsp. lineolata and Iris acutiloba subsp. longitepala.

<i>Iris barnumiae</i> Species of plant

Iris barnumiae is a species in the genus Iris; it is also in the subgenus Iris and in the section Oncocyclus. It is a rhizomatous perennial, from Armenia, Azerbaijan, Iran, Iraq, and Turkey. It has pale glaucous green and narrow leaves, that are slightly sickle-shaped and fade soon after blooming. It has, in mid- to late spring, fragrant flowers in shades of purple, from red-purple, mulberry to purplish-violet, with a yellow tipped with purple beard. It was renamed as I. barnumiae in after a plant naming conference in 2011, but is still sometimes named as I. barnumae in some sources. It has one accepted subspecies Iris barnumiae subsp. demawendica and two forms; Iris barnumiae f. protonyma (Stapf) B.Mathew & Wendelbo and Iris barnumiae f. urmiensis (Hoog) B.Mathew & Wendelbo, which has yellow flowers. Sometimes I. barnumiae f. barnumiae is used to describe the basic form. It is rarely cultivated as an ornamental plant in temperate regions, due to its needing very dry and warm summer conditions.

Iris barnumiae subsp. demawendica is a species in the genus Iris, it is also in the subgenus of Iris and in the Oncocyclus section. It is a rhizomatous perennial, from Elburz Mountains in Iran. It was originally thought to be a separate species before going through various changes before being classed as a subspecies of Iris barnumiae. It has erect, grey-green (grass-like) leaves and two large flowers, which come in shades from claret-red, burgundy, violet-blue, to dark purple, with a white or cream beard. It is rarely cultivated as an ornamental plant in temperate regions, due to the environmental conditions it prefers.

Iris cedreti is a species of flowering plant in the genus Iris; it is also in the subgenus of Iris. It is a rhizomatous perennial endemic to Lebanon. It has long narrow leaves, short stem, and flowers with a white background which is covered with very small dots or veins of dark maroon, purple, purplish-maroon, or almost black. It has a dark maroon signal patch with a brownish or purplish beard. It is rarely cultivated as an ornamental plant in temperate regions, as it needs very dry conditions during the summer. It is listed as critically endangered by the IUCN.

The precise taxonomy of the genus Allium is still poorly understood with incorrect descriptions being widespread. With over 850 species distributed over the Northern hemisphere Allium is the sole genus in the Allieae, one of four tribes of subfamily Allioideae (Amaryllidaceae). New species continue to be described and Allium is both highly variable and one of the largest monocotyledonous genera, but the precise taxonomy of Allium is poorly understood, with incorrect descriptions being widespread. The difficulties arise from the fact that the genus displays considerable polymorphism and has adapted to a wide variety of habitats. Furthermore, traditional classications had been based on homoplasious characteristics. However, the genus has been shown to be monophyletic, containing three major clades, although some proposed subgenera are not. Some progress is being made using molecular phylogenetic methods, and the internal transcribed spacer (ITS) region, including the 5.8S rDNA and the two spacers ITS1 and ITS2, is one of the more commonly used markers in the study of the differentiation of the Allium species.

Iris grossheimii is a plant species in the genus Iris, subgenus Iris and section Oncocyclus. It is a rhizomatous perennial, from the Caucasus mountains of Georgia, Armenia and Azerbaijan. It has sickle shaped leaves, which are as long as the short stem, which carries one flower in spring. It is beige, pink or brown covered in dark lines that are, purple-brown or brown. It has a large blackish brown signal patch and brown or black beard. It is rarely cultivated as an ornamental plant in temperate regions, as it needs very dry conditions during the summer.

<i>Iris paradoxa</i> Species of plant

Iris paradoxa is a species of flowering plant native to western Asia. It has large upright petals and smaller lower petals, which is unique amongst most iris forms. They come in various shades from white, lavender, mauve, medium purple, violet, dark purple to black. It has a black or purplish black beard on the lower petals. It comes from the region of Transcaucasia, and is found in the countries of Iran, Turkey, Armenia and in Azerbaijan.

<i>Haplophyllum</i> (plant)

Haplophyllum is a genus of flowering plants belonging to the family Rutaceae. It is the only genus in the subfamily Haplophylloideae.

References

  1. "The Genus Iris". mathcs.clarku.edu. Retrieved 29 July 2021.
  2. 1 2 3 4 5 6 7 8 Stebbings, Geoff (1997). The Gardener's Guide to Growing Irises . Newton Abbot: David and Charles. p.  18. ISBN   0-7153-0539-5.
  3. Samad, Nour Abdel; Dagher-Kharrat, Magda Bou; Hidalgo, Oriane; El Zein, Rana; Douaihy, Bouchra; Siljak-Yakovlev, Sonja (15 August 2016). "Unlocking the Karyological and Cytogenetic Diversity of Iris from Lebanon: Oncocyclus Section Shows a Distinctive Profile and Relative Stasis during Its Continental Radiation". PLOS ONE. 11 (8): e0160816. Bibcode:2016PLoSO..1160816A. doi: 10.1371/journal.pone.0160816 . PMC   4985135 .
  4. 1 2 3 Stearn, William (1972). A Gardenerer's Dictionary of Plant Names. London: Cassell. p. 211. ISBN   0-304-93721-5.
  5. Morris, Jim (2011). "Bearded Iris Classifications". www.irises.org (American Iris Society). Retrieved 24 July 2014.
  6. British Iris Society A Guide to Species Irises: Their Identification and Cultivation , p. 60, at Google Books
  7. Christopher Brickell RHS Encyclopedia of Plants and Flowers , p. 521, at Google Books
  8. "Aril Irises". pacificbulbsociety,org. Retrieved 1 March 2016.
  9. Saad, Layla; Khuri, Sawsan (4 August 2003). "Hanging in There by a Fall – The Oncocyclus Irises of Lebanon" (PDF). orbi.ulg.ac.be. Retrieved 23 July 2014.
  10. Pries, Bob (11 June 2014). "Section Oncocyclus". wiki.irises.org. Retrieved 2 March 2015.
  11. Cassidy, G.E.; Linnegar, S. (1987). Growing Irises (Revised ed.). Bromley: Christopher Helm. pp. 144–145. ISBN   0-88192-089-4.
  12. The book of the iris, by R. Irwin Lynch. www.biodiversitylibrary.org. p. 116. Retrieved 24 July 2014.
  13. Christopher Brickell RHS Encyclopedia of Plants and Flowers , p. 610, at Google Books