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Classification System: APG IV

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

Familia: Juncaceae
Genus: Juncus
Species: Juncus nodosus

Juncus nodosus L., Sp. Pl., ed. 2, 1: 466 (1762).

Juncus nodosus var. vulgaris Torr., Fl. New York 2: 326 (1843), nom. inval.
Juncus nodosus var. genuinus Engelm., Trans. Acad. Sci. St. Louis 2: 471 (1868), nom. inval.
Juncus rostkovii E.Mey., Syn. Junc.: 26 (1822).
Tristemon fulvus Raf., Autik. Bot.: 191 (1840).
Juncus nodosus f. intermedius Kneuck., Exsicc. (Cyper. Junc.) 1911: n.º 264 (1911).
Juncus nodosus var. prolifer Lunell, Amer. Midl. Naturalist 4: 238 (1915).
Juncus nodosus var. meridianus F.J.Herm., J. Arnold Arbor. 25: 58 (1944).

Native distribution areas:

Continental: Northern America
Regional: Subarctic America
Alaska, Northwest Territories, Yukon.
Regional: Western Canada
Alberta, British Columbia, Manitoba, Saskatchewan.
Regional: Eastern Canada
New Brunswick, Newfoundland, Nova Scotia, Ontario, Prince Edward Island, Québec.
Regional: Northwestern U.S.A.
Colorado, Idaho, Montana, Washington, Wyoming.
Regional: North-Central U.S.A.
Illinois, Iowa, Minnesota, Missouri, North Dakota, Nebraska, South Dakota, Wisconsin.
Regional: Northeastern U.S.A.
Connecticut, Indiana, Maine, Massachusetts, Michigan, New Hampshire, New Jersey, New York, Ohio, Pennsylvania, Vermont, West Virginia.
Regional: Southwestern U.S.A.
Arizona, California, Nevada, Utah.
Regional: South-Central U.S.A.
New Mexico, Texas.
Regional: Southeastern U.S.A.
Regional: Mexico
Mexico Central, Mexico Northeast, Mexico Northwest, Mexico Southwest.

Primary references

Linnaeus, C. 1762. Species Plantarum, ed. 2, Tomus I: 466. Reference page.

Additional references

Kirschner, J. & al. (2002). Juncaceae Species Plantarum: Flora of the World 6-8: 1-237, 1-336,1-192. Australian Biological Resources Study, Canberra.


Govaerts, R. et al. 2022. Juncus nodosus in Kew Science Plants of the World online. The Board of Trustees of the Royal Botanic Gardens, Kew. Published online. Accessed: 2022 Mar 07. Reference page.
Hassler, M. 2022. Juncus nodosus. World Plants: Synonymic Checklists of the Vascular Plants of the World In: Roskovh, Y., Abucay, L., Orrell, T., Nicolson, D., Bailly, N., Kirk, P., Bourgoin, T., DeWalt, R.E., Decock, W., De Wever, A., Nieukerken, E. van, Zarucchi, J. & Penev, L., eds. 2022. Species 2000 & ITIS Catalogue of Life. Published online. Accessed: 2022 Mar 07. Reference page. 2022. Juncus nodosus. Missouri Botanical Garden. Published online. Accessed: 07 Mar 2022.
International Plant Names Index. 2022. Juncus nodosus. Published online. Accessed: Mar 07 2022.
USDA, ARS, Germplasm Resources Information Network. Juncus nodosus in the Germplasm Resources Information Network (GRIN), U.S. Department of Agriculture Agricultural Research Service.

Vernacular names
English: knotted rush

Juncus nodosus is a species of rush known by the common name knotted rush. It is native to much of North America from northern Canada to central Mexico, where it grows in wet places from freshwater to salt marsh habitat. This is a rhizomatous perennial herb producing slender, smooth stems up to about 60 centimeters tall. The inflorescence is a series of spherical clusters of flowers. Each flower has green or brown pointed segments each a few millimeters long and tapering to a point.

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