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Taxon:  Cyperus difformis L.



Summary
Genus:
Cyperus
Family:
Cyperaceae
Subfamily:
Cyperoideae
Tribe:
Cypereae
Nomen number:
402807
Place of publication:
Cent. pl. II:6. 1756 (Amoen. acad. 4:302. 1759)
Verified:
12/10/2009 ARS Systematic Botanists.
Accessions:
0 (0  active, 0  available) in National Plant Germplasm System. 
Other conspecific taxa
Autonyms (not in current use), synonyms and invalid designations
No images
Reference(s)
  1. Boggan, J. et al. Checklist of the plants of the Guianas, ed. 2. 1997
  2. Boulos, L. Flora of Egypt checklist. 1995
  3. Brako, L. & J. L. Zarucchi. Catalogue of the flowering plants and gymnosperms of Peru. Monogr. Syst. Bot. Missouri Bot. Gard. 45. 1993
  4. Chinese Academy of Sciences. Flora reipublicae popularis sinicae. 1959-
  5. CIBA-GEIGY, Basel, Switzerland. Documenta CIBA-GEIGY (Grass weeds 1. 1980, 2. 1981; Monocot weeds 3. 1982; Dicot weeds 1. 1988) Note: four books on weeds worldwide in scope
  6. Dassanayake, M. D. & F. R. Fosberg, eds. A revised handbook to the flora of Ceylon. 1980-
  7. Davidse, G. et al., eds. Flora mesoamericana. 1994
  8. Euro+Med Editorial Committee. Euro+Med Plantbase: the information resource for Euro-Mediterranean plant diversity (on-line resource). http://www.emplantbase.org/home.html
  9. FNA Editorial Committee. Flora of North America. 1993- http://floranorthamerica.org/
  10. Foreman, D. B. & N. G. Walsh. Flora of Victoria. 1993-
  11. Germishuizen, G. & N. L. Meyer, eds. Plants of southern Africa: an annotated checklist. Strelitzia 14. 2003
  12. Ghazanfar, S. A. An annotated catalogue of the vascular plants of Oman. Scripta Botanica Belgica 2. 1992
  13. Gordon-Gray, K. D. Cyperaceae in Natal. 1995 56.
  14. Govaerts, R. & D. A. Simpson. World checklist of Cyperaceae, sedges. 2007 http://apps.kew.org/wcsp/home.do
  15. Grierson, A. J. C. & D. J. Long. Flora of Bhutan including a record of plants from Sikkim. 1984-
  16. Haines, R. W. & K. A. Lye. Sedges and rushes of East Africa. 1983 165.
  17. Hara, H. et al. An enumeration of the flowering plants of Nepal. 1978-1982
  18. Harden, G. J., ed. Flora of New South Wales. 1990-1993
  19. Hedberg, I. & S. Edwards. Flora of Ethiopia. 1989- (and Eritrea. 2000)
  20. Hnatiuk, R. J. Census of Australian vascular plants. Australian Flora and Fauna Series No. 11. 1990
  21. Holm, L. et al. A geographical atlas of world weeds. 1979
  22. Integrated Botanical Information System (IBIS). Australian plant common name database (on-line resource). http://www.anbg.gov.au/common.names/
  23. Jørgensen, P. M. & S. León-Yánez, eds. Catalogue of the vascular plants of Ecuador. Monogr. Syst. Bot. Missouri Bot. Gard. 75. 1999
  24. Jessop, J. P. & H. R. Toelken, eds. Flora of South Australia, ed. 4. 1986
  25. Keay, R. W. J. & F. N. Hepper. Flora of west tropical Africa, ed. 2. 1953-1972
  26. Komarov, V. L. et al., eds. Flora SSSR. 1934-1964
  27. Molina G., A. M. 2011. Review of Cyperaceae data for World Economic Plants, ed. 2. pers. comm. via e-mail on 31 Mar.
  28. Mouterde, P. Nouvelle flore du Liban et de la Syrie. 1966-
  29. Ohwi, J. Flora of Japan (Engl. ed.). 1965
  30. Porcher, M. H. et al. Searchable World Wide Web Multilingual Multiscript Plant Name Database (MMPND) (on-line resource). http://www.plantnames.unimelb.edu.au/Sorting/Frontpage.html
  31. Rechinger, K. H., ed. Flora iranica. 1963-
  32. Rye, B. L. 1997. A synopsis of the annual species of Cyperaceae from central and southern Western Australia. Nuytsia 11:405.
  33. Smith, A. C. Flora vitiensis nova. 1979-1991
  34. Smitinand, T. & K. Larsen, eds. Flora of Thailand. 1970-
  35. Stanley, T. D. & E. M. Ross. Flora of south-eastern Queensland. 1983-1989
  36. Steenis, C. G. G. J. van, ed. Flora malesiana. 1948-
  37. Thulin, M., ed. Flora of Somalia. 1993-
  38. Townsend, C. C. & E. Guest. Flora of Iraq. 1966-
  39. Tucker, G. C. 1994. Revision of the Mexican species of Cyperus (Cyperaceae). Syst. Bot. Monogr. 43:50. http://herbarium.lsa.umich.edu/SBMweb/index.html
  40. Tutin, T. G. et al., eds. Flora europaea. 1964-1980
  41. Wood, J. R. I. A handbook of the flora of Yemen. 1997
  42. Zohary, M. & N. Feinbrun-Dothan. Flora palaestina. 1966-
Common names
English
dirty-Dora –
rice sedge –
small-flower umbrella-plant –
variable flat sedge –
Portuguese
junca-diforme –
Spanish
cortadera –
juncia de agua –
lleivun –
Distribution
Native
Africa
  • EAST TROPICAL AFRICA: Kenya, Tanzania, Uganda
  • MACARONESIA: Portugal [Azores]
  • NORTHEAST TROPICAL AFRICA: Ethiopia, Somalia, Chad
  • NORTHERN AFRICA: Egypt, Libya, Morocco
  • SOUTH TROPICAL AFRICA: Malawi
  • SOUTHERN AFRICA: Botswana, Lesotho, Namibia, Eswatini, South Africa [KwaZulu-Natal, Free State, Eastern Cape, Northern Cape, Gauteng, Limpopo, Mpumalanga, North West]
  • WEST TROPICAL AFRICA: Benin, Burkina Faso, Côte D'Ivoire, Ghana, Guinea, Gambia, Guinea-Bissau, Liberia, Niger, Nigeria, Senegal, Sierra Leone, Togo
  • WEST-CENTRAL TROPICAL AFRICA: Burundi, Cameroon, Gabon, Equatorial Guinea, Rwanda, Zaire
  • WESTERN INDIAN OCEAN: Comoros, Madagascar, Mauritius, Reunion, Seychelles
Asia-Temperate
  • ARABIAN PENINSULA: Oman, Yemen
  • CAUCASUS: Azerbaijan, Georgia, Russian Federation [Dagestan]
  • CHINA: China
  • EASTERN ASIA: Korea, Japan [Hokkaido, Honshu, Kyushu, Ryukyu Islands, Shikoku], Taiwan
  • MIDDLE ASIA: Kazakhstan, Kyrgyzstan, Tajikistan, Uzbekistan
  • RUSSIAN FAR EAST: Russian Federation [Primorye]
  • WESTERN ASIA: Afghanistan, Iran, Iraq, ******, Syria, Turkey
Asia-Tropical
  • INDIAN SUBCONTINENT: Bhutan, India, Sri Lanka, Nepal, Pakistan
  • INDO-CHINA: Myanmar, Thailand, Vietnam
  • MALESIA: Indonesia, Malaysia, Philippines, Papua New Guinea
Australasia
  • AUSTRALIA: Australia [New South Wales, Queensland, South Australia, Victoria, Western Australia, Northern Territory]
Europe
  • EAST EUROPE: Ukraine
  • SOUTHEASTERN EUROPE: Albania, Bulgaria, Greece (incl. Crete), Croatia, Italy (incl. Sicily), Romania
  • SOUTHWESTERN EUROPE: Spain, France (incl. Corsica), Portugal
Naturalized
Africa
  • MACARONESIA: Portugal [Madeira Islands]
  • MIDDLE ATLANTIC OCEAN: St. Helena
Northern America
  • NORTHEASTERN U.S.A.: United States [New Jersey, Pennsylvania]
  • NORTHERN MEXICO: Mexico [Sinaloa, Sonora]
  • NORTHWESTERN U.S.A.: United States [Idaho, Oregon]
  • SOUTH-CENTRAL U.S.A.: United States [New Mexico, Texas]
  • SOUTHEASTERN U.S.A.: United States [Alabama, Florida, Georgia, Kentucky, Louisiana, Mississippi, North Carolina, South Carolina, Tennessee, Virginia]
  • SOUTHERN MEXICO: Mexico [Guanajuato, Jalisco, Michoacan]
  • SOUTHWESTERN U.S.A.: United States [Arizona, California]
Pacific
  • NORTH-CENTRAL PACIFIC: United States [Hawaii]
Southern America
  • CARIBBEAN: Jamaica, Puerto Rico
  • MESOAMERICA: Costa Rica, Nicaragua, Panama
  • NORTHERN SOUTH AMERICA: Guyana, Venezuela
  • WESTERN SOUTH AMERICA: Bolivia, Ecuador, Peru
Other (exact native range obscure)
Economic Uses
Weed


NGBT Plant Germplasm System Distribution Policy

Plant germplasm is distributed to scientists, educators, producers and other bona fide research and education entities from National genebank of Tunisia active collection sites. The NGBT Curator and/or Research Leader will, in accordance with current NPGS policies and procedures, determine the legitimacy of a request when necessary.

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Although distributions for research, education, and repatriation are of the highest priority, the NPGS also encourages various seed-saver organizations and public gardens to conduct germplasm conservation activities that engage many individuals and groups throughout the country. Elements of the NPGS cooperate with seed-saver organizations and public gardens and may store germplasm for and distribute germplasm to such organizations.

Distribution of germplasm from NPGS collections to fulfill requests from individuals seeking free germplasm strictly for home use is generally considered an inappropriate use of limited resources and conflicts with U.S. Government policy of not competing with commercial enterprises. Requestors can be asked, in an appropriate manner, to justify the use of specific NPGS germplasm instead of suitable commercially available germplasm.

Accessions listed in the Germplasm Resources Information Network (GRIN) database as “not available” due to insufficient or low viability seed and/or scheduled for regeneration will generally not be available for distribution.

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