Cyperus iria

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Classification System: APG IV

Superregnum: Eukaryota
Regnum: Plantae
Cladus: Angiosperms
Cladus: Monocots
Cladus: Commelinids
Ordo: Poales

Familia: Cyperaceae
Subfamilia: Cyperoideae
Tribus: Cypereae
Genus: Cyperus
Species: Cyperus iria
Name

Carex iria L., Sp. Pl.: 45 (1753).
Synonyms

Homotypic
Chlorocyperus iria (L.) Rikli, Jahrb. Wiss. Bot. 27: 564 (1895).
Cyperus iria var. typicus Domin, Biblioth. Bot. 20(85): 428 (1915), nom. inval.
Heterotypic
Cyperus santonici Rottb., Descr. Icon. Rar. Pl.: 41 (1773).
Cyperus iria var. santonici (Rottb.) Fernald & Griscom, Rhodora 37: 147 (1935).
Cyperus panicoides Lam., Tabl. Encycl. 1: 145 (1791).
Cyperus chrysomelinus Link, Hort. Berol. 2: 305 (1833).
Cyperus iria f. chrysomelinus (Link) Kük. in H.G.A.Engler (ed.), Pflanzenr., IV, 20(101): 151 (1935).
Cyperus diaphaniria Steud., Syn. Pl. Glumac. 2: 23 (1854).
Cyperus iria f. diaphaniria (Steud.) Miq., Fl. Ned. Ind. 3: 270 (1856).
Cyperus resinosus Hochst. ex Steud., Syn. Pl. Glumac. 2: 23 (1854).
Cyperus microlepis Baker, Fl. Mauritius: 410 (1877).
Cyperus iria var. flavescens Benth., Fl. Austral. 7: 276 (1878).
Cyperus iria f. flavescens (Benth.) Domin, Biblioth. Bot. 20(85): 429 (1915).
Cyperus paniciformis Franch. & Sav., Enum. Pl. Jap. 2: 537 (1878).
Cyperus iria var. paniciformis (Franch. & Sav.) C.B.Clarke in J.D.Hooker, Fl. Brit. India 6: 607 (1893).
Cyperus iria f. multiflora Domin, Biblioth. Bot. 20(85): 428 (1915).
Cyperus nangtciangensis Pamp., Nuovo Giorn. Bot. Ital., n.s., 22: 260 (1915).

Distribution
Native distribution areas:

Continental: Africa
Regional: West Tropical Africa
Benin, Burkina, Gambia, The, Ghana, Ivory Coast, Mali, Mauritania, Nigeria, Niger, Senegal.
Regional: West-Central Tropical Africa
Gabon, Zaïre.
Regional: Northeast Tropical Africa
Chad, Eritrea, Ethiopia, Somalia, Sudan.
Regional: East Tropical Africa
Kenya, Tanzania, Uganda.
Regional: Southern Africa
Botswana, Namibia, Swaziland, Northern Provinces.
Regional: Western Indian Ocean
Chagos Archipelago, Mauritius (introduced), Madagascar, Réunion, Rodrigues (introduced).
Continental: Asia-Temperate
Regional: Middle Asia
Turkmenistan, Uzbekistan.
Regional: Western Asia
Afghanistan, Iran, Iraq.
Regional: Arabian Peninsula
Oman.
Regional: China
China South-Central, Hainan, Manchuria, China North-Central, China Southeast, Tibet, Xinjiang.
Regional: Eastern Asia
Japan, Korea, Kazan-retto, Nansei-shoto, Ogasawara-shoto, Taiwan.
Continental: Asia-Tropical
Regional: Indian Subcontinent
Assam, Bangladesh, East Himalaya, India, Nepal, Pakistan, Sri Lanka, West Himalaya.
Regional: Indo-China
Andaman Islands (introduced), Laos, Myanmar, Nicobar Islands (introduced), South China Sea, Thailand, Vietnam.
Regional: Malesia
Borneo, Jawa, Lesser Sunda Islands, Malaya, Maluku, Philippines, Sulawesi, Sumatera.
Regional: Papuasia
New Guinea.
Continental: Australasia
Regional: Australia
New South Wales, Northern Territory, Queensland, South Australia, Western Australia.
Continental: Pacific
Regional: Southwestern Pacific (all introduced)
Fiji, Nauru, Niue, New Caledonia.
Regional: South-Central Pacific (introduced)
Society Islands.
Regional: Northwestern Pacific
Caroline Islands, Marianas.
Continental: Northern America (all introduced)
Regional: Northwestern U.S.A.
Oregon.
Regional: North-Central U.S.A.
Illinois, Missouri, Oklahoma.
Regional: Northeastern U.S.A.
Connecticut, Massachusetts, New York, West Virginia.
Regional: Southwestern U.S.A.
California.
Regional: South-Central U.S.A.
Texas.
Regional: Southeastern U.S.A.
Alabama, Arkansas, Delaware, District of Columbia, Florida, Georgia, Kentucky, Louisiana, Maryland, Mississippi, North Carolina, South Carolina, Tennessee, Virginia.
Regional: Mexico
Mexico Central, Mexico Gulf, Mexico Northwest, Mexico Southeast, Mexico Southwest.
Continental: Southern America (all introduced)
Regional: Central America
Belize, Costa Rica, Honduras, Panama.
Regional: Caribbean
Cuba, Puerto Rico, Trinidad-Tobago, Windward Islands.
Regional: Northern South America
Venezuela.
Regional: Western South America
Bolivia, Colombia, Ecuador, Peru.
Regional: Brazil
Brazil North, Brazil Northeast, Brazil West-Central.
Regional: Southern South America
Argentina Northeast, Argentina Northwest.

References: Brummitt, R.K. 2001. TDWG – World Geographical Scheme for Recording Plant Distributions, 2nd Edition
References
Primary references

Linnaeus, C. 1753. Species Plantarum. Tomus I: 345. Reference page.

Links

Govaerts, R. et al. 2020. Cyperus iria in World Checklist of Selected Plant Families. The Board of Trustees of the Royal Botanic Gardens, Kew. Published online. Accessed: 2020 Feb 09. Reference page.
International Plant Names Index. 2020. Cyperus iria. Published online. Accessed: Feb 09 2020.
Govaerts, R. et al. 2020. Cyperus iria in Kew Science Plants of the World online. The Board of Trustees of the Royal Botanic Gardens, Kew. Published online. Accessed: 2020 Feb 09. Reference page.
Tropicos.org 2020. Cyperus iria. Missouri Botanical Garden. Published online. Accessed: 09 Feb 2020.
USDA, ARS, Germplasm Resources Information Network. Cyperus iria in the Germplasm Resources Information Network (GRIN), U.S. Department of Agriculture Agricultural Research Service. Accessed: 08-Apr-12.

Vernacular names
English: ricefield flatsedge
日本語: コゴメガヤツリ
русский: Сыть ирия
中文: 碎米莎草, 具芒碎米莎草

Cyperus iria (also known as rice flat sedge and rice flatsedge) is a smooth, tufted sedge found worldwide. The roots are yellowish-red and fibrous.[2][3] The plant often grows in rice paddies, where it is considered to be a weed.[4]
See also

List of Cyperus species

References

"Cyperus iria". Integrated Taxonomic Information System.
International Rice Research Institute (1983). "Field problems of tropical rice", revised, p. 121. Int. Rice Res. Inst. ISBN 971-10-4080-8, ISBN 978-971-10-4080-2
Marita Ignacio Galinato, Keith Moody, Colin M. Piggin (1999). "Upland rice weeds of south and southeast Asia", p. 39, Int. Rice Res. Inst. ISBN 971-22-0130-9, ISBN 978-971-22-0130-1
"Cyperus iria L. - CYPERACEAE - Monocotyledon". Archived from the original on 2011-07-27. Retrieved 2009-11-17.