Taxon: Juncus effusus L.

Genus: Juncus
Family: Juncaceae
Nomen number: 20791
Place of publication: Sp. pl. 1:326. 1753
Link to protologue:
Name Verified on: 21-Sep-2000 by ARS Systematic Botanists. Last Changed: 09-May-2011
Species priority site is: Arctic and Subarctic Plant Gene Bank (PALM)
Accessions: 13 in National Plant Germplasm System (GoogleMap)

Other conspecific taxa:

Common names:

Economic Importance:

  • Environmental: ornamental (fide Invasive Pl Spec)
  • Medicines: folklore (fide Herbs Commerce ed2)
  • Vertebrate poisons: mammals (fide Cooper & Johnson ed2)
  • Weed: potential seed contaminant (fide Weed CIBA; Invasive Pl Spec)

Distributional Range:


  • Africa

    • East Tropical Africa: Kenya ; Tanzania ; Uganda
    • Macaronesia: Portugal Azores, Madeira Islands; Spain Canary Islands
    • Northern Africa: Algeria ; Morocco
    • South Tropical Africa: Zimbabwe
    • Southern Africa: Lesotho ; South Africa Cape Province, Free State, KwaZulu-Natal, Transvaal
    • West-Central Tropical Africa: Burundi ; Rwanda
    • Western Indian Ocean: Madagascar ; Mauritius
  • Asia-Temperate

    • Caucasus: Armenia ; Azerbaijan ; Georgia ; Russian Federation Dagestan; Russian Federation-Ciscaucasia Ciscaucasia
    • China: China Anhui, Zhejiang, Fujian, Heilongjiang, Henan, Hebei, Hunan, Hubei, Gansu, Jiangsu, Jilin, Guangdong, Guizhou, Liaoning, Shandong, Sichuan, Yunnan, Guangxi, Xizang
    • Eastern Asia: Taiwan
    • Siberia: Russian Federation Altay, Gorno-Altay
    • Western Asia: Afghanistan ; Cyprus ; Iran ; Iraq ; Turkey
  • Asia-Tropical

    • Indian Subcontinent: India
  • Europe

    • Eastern Europe: Belarus ; Estonia ; Latvia ; Lithuania ; Russian Federation-European part European part; Ukraine
    • Middle Europe: Austria ; Belgium ; Czech Republic ; Germany ; Hungary ; Netherlands ; Poland ; Slovakia ; Switzerland
    • Northern Europe: Denmark ; Finland ; Ireland ; Norway ; Sweden ; United Kingdom
    • Southeastern Europe: Albania ; Bosnia and Herzegovina ; Bulgaria ; Croatia ; Greece ; Italy ; Montenegro ; Romania ; Serbia ; Slovenia
    • Southwestern Europe: France ; Portugal ; Spain
  • Northern America

    • Eastern Canada: Canada New Brunswick, Newfoundland, Nova Scotia, Ontario, Prince Edward Island, Quebec
    • North-Central U.S.A.: United States Illinois, Kansas, Minnesota, Missouri, Nebraska, Oklahoma, Wisconsin
    • Northeastern U.S.A.: United States Connecticut, Indiana, Maine, Massachusetts, Michigan, New Hampshire, New Jersey, New York, Ohio, Pennsylvania, Rhode Island, Vermont, West Virginia
    • Northern Mexico: Mexico Baja Norte, Durango, Sinaloa
    • Northwestern U.S.A.: United States Colorado, Idaho, Montana, Oregon, Washington
    • South-Central U.S.A.: United States Texas
    • Southeastern U.S.A.: United States Alabama, Arkansas, Delaware, District of Columbia, Florida, Georgia, Kentucky, Louisiana, Maryland, Mississippi, North Carolina, South Carolina, Tennessee, Virginia
    • Southern Mexico: Mexico Aguascalientes, Chiapas, Federal District, Guanajuato, Hidalgo, Jalisco, Mexico, Michoacan, Morelos, Oaxaca, Puebla, Tabasco, Veracruz
    • Southwestern U.S.A.: United States California, Nevada
    • Subarctic America: United States Alaska
    • Western Canada: Canada British Columbia, Manitoba
  • Southern America

    • Brazil: Brazil
    • Caribbean: Guadeloupe ; Haiti
    • Central America: Costa Rica ; El Salvador ; Guatemala ; Honduras
    • Northern South America: Venezuela
    • Southern South America: Argentina Catamarca, Rio Negro, Salta, Tucuman, Tierra del Fuego; Chile
    • Western South America: Bolivia ; Colombia ; Ecuador ; Peru

  • Naturalized

  • Australasia

    • Australia: Australia
    • New Zealand: New Zealand
  • Pacific

    • North-Central Pacific: United States Hawaii

  • Cultivated


  • Aldén, B., S. Ryman, & M. Hjertson Svensk Kulturväxtdatabas, SKUD (Swedish Cultivated and Utility Plants Database; online resource on 2012 (Kulturvaxtdatabas)
  • Balslev, H. 1996. Juncaceae Fl. Neotrop. Monogr. 68:88.
  • Brako, L. & J. L. Zarucchi Catalogue of the flowering plants and gymnosperms of Peru. Monogr. Syst. Bot. Missouri Bot. Gard. 45. 1993 (L Peru)
  • CIBA-GEIGY, Basel, Switzerland Documenta CIBA-GEIGY (Grass weeds 1. 1980, 2. 1981; Monocot weeds 3. 1982; Dicot weeds 1. 1988) (Weed CIBA)
  • Cooper, M. R. & A. W. Johnson Poisonous plants and fungi in Britain: animal and human poisoning. 1998 (Cooper & Johnson ed2)
  • Davis, P. H., ed. Flora of Turkey and the east Aegean islands. (F Turk)
  • Dyer, R. A. et al., eds. Flora of southern Africa. (F SAfr)
  • FNA Editorial Committee Flora of North America. (F NAmer)
  • Germishuizen, G. & N. L. Meyer, eds. Plants of southern Africa: an annotated checklist. Strelitzia 14. 2003 (Pl SAfr ed2)
  • Gleason, H. A. & A. Cronquist Manual of vascular plants of northeastern United States and adjacent Canada, ed. 2. 1991 (Glea Cron ed2)
  • Groth, D. 2005. pers. comm. (pers. comm.)
  • Institute of Pacific Islands Forestry Pacific Island Ecosystems at Risk (PIER): plant threats to Pacific ecosystems (on-line resource). (Pacif I Ecosyst Risk)
  • Kartesz, J. T. A synonymized checklist of the vascular flora of the United States, Canada, and Greenland. (L US Can ed2)
  • Kirschner, J. 2002. Juncaceae 3: Juncus subg. Agathryon (Species Plant) 8:88-94.
  • Komarov, V. L. et al., eds. Flora SSSR. (F USSR)
  • Krasnoborov, I. M., ed. Flora of Siberia (English translation). 2000- (F Siberia)
  • Lazarides, M. & B. Hince CSIRO Handbook of Economic Plants of Australia. 1993 (Econ Pl Aust)
  • McGuffin, M., J. T. Kartesz, A. Y. Leung, & A. O. Tucker Herbs of commerce, ed. 2. 2000 (Herbs Commerce ed2)
  • McVaugh, R. Flora Novo-Galiciana. (F NGalicia)
  • Personal Care Products Council International Nomenclature Cosmetic Ingredient (INCI)
  • Rehm, S. Multilingual dictionary of agronomic plants. 1994 (Dict Rehm)
  • Sell, P. & G. Murrell Flora of Great Britain and Ireland. (F GB Ire)
  • Silva, L. et al. Listagem da fauna e flora terrestres dos Açores. Lista des plantas vasculares (Pteridophyta e Spermatophyta). (L Azores)
  • Tutin, T. G. et al., eds. Flora europaea. (F Eur)
  • Wagner, W. L. et al. Manual of the flowering plants of Hawai'i. 1990 (F Hawaii)
  • Weber, E. Invasive plant species of the world: a reference guide to environmental weeds. 2003 (Invasive Pl Spec)
  • Wu Zheng-yi & P. H. Raven et al., eds. Flora of China (English edition). (F ChinaEng)
  • Zuloaga, F. O. & O. Morrone, eds. Catálogo de las plantas vasculares de la República Argentina. I. Pteridophyta, Gymnospermae y Angiospermae (Monocotyledonae), II. Dicotyledonae. Monogr. Syst. Bot. Missouri Bot. Gard. 60, 74. (L Argent)

Check other web resources for Juncus effusus L. :


  • Seed: U.S. National Seed Herbarium image