Cyperus rotundus 

Scope: Global
Language: English

Translate page into:

Taxonomy [top]

Kingdom Phylum Class Order Family
Plantae Tracheophyta Liliopsida Poales Cyperaceae

Scientific Name: Cyperus rotundus L.
Regional Assessments:
Common Name(s):
English Nut-grass
French Souchet Rond
Cyperus merkeri C.B.Clarke
Cyperus nubicus C.B.Clarke
Cyperus retzii Nees
Cyperus rotundus L. ssp. taylorii (C.B.Clarke) Kük.
Cyperus taylorii C.B.Clarke

Assessment Information [top]

Red List Category & Criteria: Least Concern ver 3.1
Year Published: 2017
Date Assessed: 2016-06-07
Assessor(s): Lansdown, R.V., Juffe Bignoli, D. & Beentje, H.J.
Reviewer(s): Luke, W.R.Q.
Contributor(s): Knees, S.G., Patzelt, A., Neale, S. & Williams, L.
Facilitator/Compiler(s): Maiz-Tome, L.
This is a very widespread and common species with no major threats.
Previously published Red List assessments:

Geographic Range [top]

Range Description:This species has an almost global distribution and is absent only from northern regions; it ranges from central Europe south through the Mediterranean and eastern Europe to north Africa and more or less throughout Africa south of the Sahara. It ranges east through central Asia, the middle east and south Asia to east and south-east Asia, south to Australia. It occurs on most of the Indian Ocean Islands, some north-west Pacific islands, Hawaii, throughout the southern United States south through Mexico to Central and South America. It has apparently been introduced to some islands, California, Arizona and Chile (The Board of Trustees of the Royal Botanic Gardens, Kew 2012).
Countries occurrence:
Afghanistan; Albania; Algeria; Angola; Argentina; Armenia; Australia (New South Wales, Northern Territory, Queensland, South Australia, Western Australia); Austria; Azerbaijan; Bahrain; Belize; Benin; Bolivia, Plurinational States of; Bosnia and Herzegovina; Botswana; Brazil; British Indian Ocean Territory (Chagos Archipelago); Bulgaria; Burkina Faso; Burundi; Cameroon; Cape Verde; Central African Republic; Chad; China (Anhui, Chongqing, Fujian, Gansu, Guangdong, Guangxi, Guizhou, Hainan, Hebei, Henan, Hubei, Hunan, Jiangsu, Jiangxi, Liaoning, Shaanxi, Shandong, Shanxi, Sichuan, Yunnan, Zhejiang); Christmas Island; Colombia; Comoros; Congo; Congo, The Democratic Republic of the; Costa Rica (Cocos I., Costa Rica (mainland)); Côte d'Ivoire; Croatia; Cyprus; Djibouti; Dominican Republic; Ecuador; Egypt (Egypt (African part), Sinai); El Salvador; Equatorial Guinea; Eritrea; Ethiopia; France (Corsica, France (mainland)); French Guiana; French Polynesia (Society Is. - Introduced, Tuamotu - Introduced); French Southern Territories (Mozambique Channel Is.); Gabon; Gambia; Georgia (Abkhaziya, Adzhariya, Gruziya); Ghana; Greece (Greece (mainland), Kriti); Guatemala; Guinea; Guyana; Honduras; India (Andaman Is., Andhra Pradesh, Arunachal Pradesh, Assam, Bihar, Delhi, Goa, Gujarat, Himachal Pradesh, Jammu-Kashmir, Karnataka, Kerala, Madhya Pradesh, Maharashtra, Manipur, Meghalaya, Orissa, Punjab, Rajasthan, Sikkim, Tamil Nadu, Uttar Pradesh, West Bengal); Indonesia (Bali, Jawa, Kalimantan, Lesser Sunda Is., Maluku, Papua, Sulawesi, Sumatera); Iran, Islamic Republic of; Iraq; Italy (Italy (mainland), Sardegna, Sicilia); Japan (Ogasawara-shoto); Kazakhstan; Kenya; Korea, Democratic People's Republic of; Korea, Republic of; Kyrgyzstan; Lebanon; Lesotho; Libya; Macedonia, the former Yugoslav Republic of; Madagascar; Malawi; Malaysia (Peninsular Malaysia, Sabah); Mali; Malta; Marshall Islands; Mauritania; Mauritius (Mauritius (main island), Rodrigues); Mexico; Micronesia, Federated States of ; Morocco; Mozambique; Myanmar (Myanmar (mainland)); Namibia (Caprivi Strip, Namibia (main part)); Nepal; Nicaragua; Niger; Nigeria; Northern Mariana Islands; Oman; Pakistan; Palestinian Territory, Occupied; Panama; Paraguay; Peru; Philippines; Portugal (Azores, Madeira, Portugal (mainland), Selvagens); Puerto Rico (Puerto Rico (main island)); Qatar; Réunion; Romania; Rwanda; Saudi Arabia; Senegal; Serbia (Kosovo, Serbia); Seychelles (Aldabra, Seychelles (main island group)); Sierra Leone; Slovenia; Somalia; South Africa (Eastern Cape Province, Free State, Gauteng, KwaZulu-Natal, Limpopo Province, Mpumalanga, Northern Cape Province, North-West Province, Western Cape); South Sudan; Spain (Baleares, Canary Is., Spain (mainland)); Sri Lanka; Sudan; Suriname; Swaziland; Switzerland; Syrian Arab Republic; Taiwan, Province of China (Taiwan, Province of China (main island)); Tanzania, United Republic of; Thailand; Togo; Tunisia; Turkey (Turkey-in-Asia, Turkey-in-Europe); Turkmenistan; Uganda; United Arab Emirates; United States (Alaska, Arizona - Introduced, Arkansas, California - Introduced, Florida, Georgia, Hawaiian Is., Minnesota, Missouri, New Mexico, North Carolina, South Carolina, Tennessee, Texas, Virginia); United States Minor Outlying Islands (US Line Is. - Introduced, Wake Is.); Uzbekistan; Venezuela, Bolivarian Republic of; Viet Nam; Virgin Islands, British; Wallis and Futuna; Western Sahara; Yemen (North Yemen, Socotra, South Yemen); Zambia; Zimbabwe
Cook Islands (Cook Is.); Fiji; New Zealand (Kermadec Is.); Norfolk Island; Saint Helena, Ascension and Tristan da Cunha (Ascension, Saint Helena (main island)); Tonga
Additional data:
Upper elevation limit (metres):2500
Range Map:Click here to open the map viewer and explore range.

Population [top]

Population:This species can be very common and form large stands in suitable habitats.
Current Population Trend:Stable
Additional data:
Population severely fragmented:No

Habitat and Ecology [top]

Habitat and Ecology:Cyperus rotundus occurs in a wide variety of wetland habitats including seasonally wet grasslands, swamps, drainage lines and ditches, pond and lake margins, springs, stream and river banks. Is tolerant of disturbance and often grows in waste areas, as well as damp cultivated habitats. The species can become a serious weed within cultivated areas (Cook 1996).
Systems:Terrestrial; Freshwater
Continuing decline in area, extent and/or quality of habitat:No

Use and Trade [top]

Use and Trade:

There is no evidence to suggest that this species is utilised.

Threats [top]

Major Threat(s):

There are no known significant past, ongoing or future threats to this species.

Conservation Actions [top]

Conservation Actions:

There are no conservation measures in place and none are required.

Citation: Lansdown, R.V., Juffe Bignoli, D. & Beentje, H.J. 2017. Cyperus rotundus. The IUCN Red List of Threatened Species 2017: e.T158183A84284983. . Downloaded on 24 September 2018.
Disclaimer: To make use of this information, please check the <Terms of Use>.
Feedback: If you see any errors or have any questions or suggestions on what is shown on this page, please provide us with feedback so that we can correct or extend the information provided